Tue, Feb 23, 2027Spring (Semester 2) · Week 6Day 18 of 5780-min blockTight fit

Maniken muscle build

Essential question: Why does the exact spot where a muscle attaches decide what movement your body can make?Enduring understanding: A muscle can only pull, never push, so where it starts and where it ends fully determines which bone moves and in which direction.

Safety gate · before any work

  • Keep clay away from eyes and mouth.
  • Wash hands before and after handling clay.
  • Do not use wire or sharp implements inside clay near the model without teacher direction.

Do now

Build major muscles onto a Maniken model and explain each muscle's action.

DueTonight, 11:29 PM
Hand in
Two labeled photos of your Maniken muscle build (anterior and posterior views) with each muscle identified and its action stated.
Where
Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not.

You get two school days for every day you were absent, so this deadline moves with you.

Where you are · this course
Unit 1.2 Muscles and Motion: Muscle contraction, muscle orientation, Maniken muscle build, movement and biomechanics. Maniken muscle build ▸ Day 3
Day 18 of 57 this semester39 left before WebXam
🧬 Where you are · PLTW
Human Body SystemsUnit 1: Road to Rehabilitation ▸ Lesson 1.2 Muscles and Motion"Activities 1.2.1-1.2.5 (muscle contraction, joints; names TBA in myPLTW)"
Activity names confirmed from PLTW's published HBS career-connections and Mr. Mendoza's licensed updated-HBS materials. Mr. Mendoza will confirm the exact numbering in myPLTW once the course shell opens.
Today's driving question

If you place the biceps on the Maniken with its ends swapped, or a few centimeters off, why does the model suddenly 'move' the wrong bone or the wrong way?

Today you'll be able to

Build major muscles onto a Maniken model and explain each muscle's action.

You've got it when
  • You can place major muscles in correct origin-to- position.
  • You can state the action each muscle produces.
Due today · Lab report RequiredTwo labeled photos of your Maniken muscle build ( and views) with each muscle identified and its action stated.
Do-Now · start these with your notes closed
  1. A muscle can only do one thing to its two attachment points when it contracts. What is it: push them apart, or pull them together?
  2. Which end of a muscle is the origin, the one that barely moves or the one that moves the bone?
Do this · step by step
numbered so we can always find our place
  1. 1Review the assigned muscle group and its origin, , and action.
  2. 2Roll and place the clay muscles onto the Maniken in correct anatomical order.
  3. 3Label each muscle and state the movement it produces.
  4. 4Check your build against the reference and fix any misplacement with your group.
  5. 5Submit a photo of your labeled Maniken muscle build.
Interrupted or lost? Behind on the build? Review your assigned muscle's origin, , and action (step 1), roll and place the clay muscles in anatomical order (step 2), label each with the movement it produces (step 3), check against the reference, then submit your photo.
The story

What did this day actually feel like?

Maniken muscle build

BUILD LAB This is the one people told me about. You roll actual clay muscles and place them on a skeleton model, in anatomical order, from origin to insertion.

It is much harder than it sounds. You cannot place a muscle correctly unless you know which bone it pulls from and which bone it moves, and if you build a layer in the wrong order you have to take the top ones off to fix it. I put a muscle on backwards and my partner caught it because the action would have been impossible.

Photographing anterior and posterior views with every muscle labeled is the deliverable.

Turned in: labeled Maniken build photos → Lab Reports folder

Fiction. There is no such student. The lessons, labs and dates are the real planned course; the student, the classmates and the conversations are invented.

The comic

The same day, drawn.

Drawing, panel 24: Maniken muscle build.

This is the one people told me about. You roll actual clay muscles and place them on a skeleton model, in anatomical order, from origin to insertion.

PARTNER

That muscle is on backwards. The action you just described would be impossible.

Panel 24Maniken muscle build · 2027-02-23
Read week 5, 5 panels

Fiction. There is no such student. The lessons, labs and dates are the real planned course; the student, the classmates and the conversations are invented.

🛠 Get unstuck · pick your level

Run the lab
Run the build. Place your assigned muscles on the Maniken with correct origin and insertion, label each, and state the movement it produces, then fix any misplacement with your group against the reference.
Absent? Async catch-up
Absent today? Catch up async: pick two muscles from the list (say biceps brachii and gastrocnemius), and for each write its origin, insertion, and the one movement it makes, so you can place them when you return.

Lab day: Tier 1 is the whole class at the bench. No extension today.

🔑 Today's words · 5

sarcomereactinmyosincontractiontendon
+3 more in the word bank

Tap a word in the lesson for a plain meaning and one example. Recycled into next week's Do-Now.

Today's study notebook
The muscular system: sarcomeres, the sliding-filament model, and how muscles contract.
Open the notebook
Watch first: today's 1-minute intro
Audio overviewVideo overviewMind mapStudy guideFlashcardsQuizData table
Where this fits
Tested on (Ohio WebXam)
Human Anatomy and Physiology · 072040 (likely, pending confirmation)
PLTW lesson
HBS · Lesson 1.2 Muscles and Motion
WebXam domain
Human Body Form, Function, and Pathophysiology
Evidence to produce
Lab report
Lab / skill
Khan Academy: Muscular System
Do the work · 80-minute blockfirst 5 min = hook

💡 Big idea: A muscle can only pull its toward its origin, so the placement of those two points determines which bone moves and in which direction.

  1. 0-10 and materials setup; review assigned muscle group and reference
  2. 10-20Roll clay muscles in correct proportions for each muscle
  3. 20-50Place muscles on Maniken at correct origin-to-; add labels
  4. 50-65Group check against reference; correct misplacements
  5. 65-75Photograph labeled build from and
  6. 75-80Submit photos; clean up clay and materials
Mr. Mendoza's 5-minute intro
  • Today we get hands on. Your group is building a muscle-covered skeleton using the Maniken and clay.
  • You are not just shaping clay. You are placing each muscle at its anatomically correct origin and . Wrong placement means wrong action.
  • Use your reference sheet the entire time. Check against it before labeling. Check again after.
  • The photo you submit today becomes part of Thursday when we analyze how these same muscles work in pairs.
Know by the end
  • Origin: the or less-movable attachment point of a muscle. : the or more-movable point. Action: the movement produced when the muscle contracts.
  • Major muscle groups to recognize: biceps brachii, triceps brachii, quadriceps femoris, hamstrings, gastrocnemius, deltoid, and pectoralis major.
  • Accurate placement on the Maniken requires using directional terms (, , medial, lateral) from the launch unit.
Open this PLTW section today

Unit 1.2 Muscles and Motion: Muscle contraction, muscle orientation, Maniken muscle build, movement and biomechanics. · Maniken muscle build

Day 3 of this lesson. Open this exact section in myPLTW (find it in Clever, Microsoft sign-in), then do the work below.

Do this: Complete any Maniken-build or muscle-placement task in Lesson 1.2 Muscles and Motion on myPLTW that accompanies today's lab; finish it alongside your in-class build.

Complete

Mark the task complete after submitting your labeled Maniken muscle-build photo.

How far to get

Sliding-filament task is done; today the muscle-placement task should show complete.

Upload as evidence

myPLTW completion status plus your labeled photo.

The official PLTW activity stays inside myPLTW. If myPLTW will not open, use F1 and E1-E3 on this page to complete today's local evidence decision, then make up the official activity when access returns. Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not.

Today's PLTW tracker · fill in and submit

Check things off as you work, then submit. This tells Mr. Mendoza how you're doing so he can help the class. It does not replace turning in your producible through the submission route shown below.

Use the code Mr. Mendoza gave you, not your name. Saved on this device.

Unit 1.2 Muscles and Motion: Muscle contraction, muscle orientation, Maniken muscle build, movement and biomechanics.Day 3 of this projectSee the full week plan
Today's PLTW target

Unit 1.2 Muscles and Motion: Muscle contraction, muscle orientation, Maniken muscle build, movement and biomechanics. · Maniken muscle build

Complete any Maniken-build or muscle-placement task in Lesson 1.2 Muscles and Motion on myPLTW that accompanies today's lab; finish it alongside your in-class build.

Sliding-filament task is done; today the muscle-placement task should show complete.

This is how Mr. Mendoza sees the class keeping pace with PLTW. Be honest, it only helps if it is accurate.

1 · What you do today

🎯 Build major muscles onto a Maniken model and explain each muscle's action.

  • Review the assigned muscle group and its origin, , and action.
  • Roll and place the clay muscles onto the Maniken in correct anatomical order.
  • Label each muscle and state the movement it produces.
  • Check your build against the reference and fix any misplacement with your group.
  • Submit a photo of your labeled Maniken muscle build.
2 · What you turn in

Lab report: Two labeled photos of your Maniken muscle build ( and views) with each muscle identified and its action stated.

Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not. Use the checklist just below and upload by 11:29 PM for full credit. Absent with an excused absence? You get two school days for every day you were absent, so this deadline moves with you.

3 · Who's doing what (team)
TaskWho
Review the assigned muscle group and its origin, , and action._______
Roll and place the clay muscles onto the Maniken in correct anatomical order._______
Label each muscle and state the movement it produces._______
Check your build against the reference and fix any misplacement with your group._______
Submit a photo of your labeled Maniken muscle build._______

Working solo? Put your own name in "Who" for every row.

4 · Words I can use correctly
5 · I'm successful today when I can…
  • You can place major muscles in correct origin-to- position.
  • You can state the action each muscle produces.
6 · Reflection & next steps
Where are you today?0/7 checked
Pick your period and code first.
Your 4 steps today
  1. 1
    Do this
    Build major muscles onto a Maniken model and explain each muscle's action.
  2. 2
  3. 3
    Submit this
    Lab report: Two labeled photos of your Maniken muscle build (anterior and posterior views) with each muscle identified and its action stated.
  4. 4
    Submit it here
    1. 1Open the drop folder.
    2. 2Sign in with your district Microsoft account, not a personal one.
    3. 3Upload the file, named Lastname_Firstname__Assignment Title.
    4. 4Your own upload panel says Uploaded with a green check: that is your receipt.
    Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not. Human Anatomy & Physiology (Human Body Systems) › Unit 1.2 Muscles and Motion: Muscle contraction, muscle orientation, Maniken muscle build, movement and biomechanics. › Lab report
    Open the drop folder
Were you absent? Jump to the make-up plan
Learn it · deck, reading, and vocabulary
Socratic teaching slide deck

The deck carries the prior idea forward, lets you inspect an analogy, maps the rule to biology, and ends with the same evidence decision and exit ticket used on this page.

Generated from this lesson's canonical data with a red-team citation check.

Carry forward

Performance-enhancing drugs change muscle physiology through real pathways, so they create health risks and fairness problems at the same time and cannot be judged on winning alone.

Daily take-home

A muscle can only pull its toward its origin, so the placement of those two points determines which bone moves and in which direction.

Inspect the analogy

A bridge prototype is tested against a load limit, cost limit, and user need before revision.

  1. Which requirement is a criterion?
  2. Which limit is a constraint?
  3. What test result should trigger a redesign?
Rule

A design improves when evidence is compared with explicit criteria and constraints.

Where it breaks

Biomedical designs also require , ethics, and biological validation beyond a physical prototype test.

Map the analogy to biology
  • Bridge requirements map to design criteria.
  • Load results map to E1-E3.
  • Revision maps to the next evidence-based iteration.
Read this first

Driving question: If you place the biceps on the Maniken with its ends swapped, or a few centimeters off, why does the model suddenly 'move' the wrong bone or the wrong way?

What you already know: Performance-enhancing drugs change muscle physiology through real pathways, so they create health risks and fairness problems at the same time and cannot be judged on winning alone.

New idea: A muscle can only pull its toward its origin, so the placement of those two points determines which bone moves and in which direction.

Visual or model: F1. F1. A lesson illustration or teaching diagram for Maniken muscle build. Use it with E1-E3; it is a model or context image, not experimental or patient data. What to notice: Trace the labeled structure, movement, or system relationship that connects form to function.

  1. Observe or measure the relevant feature in Maniken muscle build.
  2. Organize the observation with a stable evidence ID.
  3. Apply this rule: A design improves when evidence is compared with explicit criteria and constraints.
  4. Choose the option the evidence supports and state the limit of the conclusion.

Real biomedical example: If you place the biceps on the Maniken with its ends swapped, or a few centimeters off, why does the model suddenly 'move' the wrong bone or the wrong way?

What the evidence supports: E1-E3 and F1 support the daily take-home when the response meets the stated success criteria.

What it cannot prove: The package does not support claims beyond this lesson's or any real patient diagnosis.

Vocabulary:
  • : The basic contracting unit of a muscle fiber, made of overlapping and filaments that slide past each other to shorten the muscle.
  • : A that forms thin filaments inside cells and slides past to produce muscle and cell movement.
  • : A motor in muscle whose heads grab and pull on filaments, producing the sliding motion that contracts the muscle.
  • : The shortening of a muscle as its fibers pull together, generating force to move bones, pump blood, or squeeze organs.
  • : A tough band of that anchors a muscle to a bone, transferring the muscle's pull so the bone can move.
  • origin: The fixed, anchoring attachment point of a muscle on a bone, which stays still while the muscle pulls on its other end.
  • : The end of a skeletal muscle attached to the bone that moves when the muscle contracts, as opposed to the more fixed origin end.
  • lever: A rigid bar that pivots at a fixed point to move a load, the simple machine that bones, joints, and muscles form to create movement.

Use it now: Choose one decision option. Cite E1 and E3, then explain how the rule connects the evidence to your choice.

Go further, optional: The source links below are optional enrichment. Every fact required for today's local evidence decision appears in this lesson package.

Evidence set and decision
E1 · Observation

Origin: the or less-movable attachment point of a muscle. : the or more-movable point. Action: the movement produced when the muscle contracts.

Limit: E1 supplies context or an observation; it does not by itself establish the explanation.

E2 · Mechanism

A muscle can only pull its toward its origin, so the placement of those two points determines which bone moves and in which direction.

Limit: E2 is a teaching statement or comparison and must be checked against the task evidence.

E3 · Result

You can place major muscles in correct origin-to- position.

Limit: E3 supports only the result or product criterion named here; it cannot justify a broader clinical or causal claim.

PLTW-HAP-2027-02-23 · Simulated classroom evidence scenario

Your role: anatomy and physiology consultant

Decision: Your team must decide what the evidence from Maniken muscle build supports before submitting the lab report named on the lesson page.

  • Keep the current design.
  • Revise the feature that misses a criterion.
  • Run one more fair test before choosing.

Response: State one choice, cite at least two evidence IDs, explain the rule that connects them, and add one limitation. Submit it as the lab report.

Claim ceiling: The supplied lesson evidence can support an observation, pattern, classroom mechanism, or next-step decision about Maniken muscle build. It cannot by itself prove causation, establish a real clinical diagnosis, or justify action outside this classroom task.

Watch the trap

Students often think Students think a muscle can both push and pull, so they place clay muscles loosely and assume the model will still move correctly.. The trap: Muscles only pull. They shorten and drag the toward the origin, and they cannot push a bone back. That is why the origin (the fixed, usually end) and the insertion (the moving, usually end) must be placed correctly, or the muscle will pull the wrong bone.

Worked example · a parallel case (guides, does not reveal)
Labeled Maniken muscle build photos
Completes: Two labeled photographs (anterior and posterior views) of clay muscles placed on the model in correct origin-to-insertion position, each muscle named with the movement it produces.

Anterior view (labeled muscles and actions):

  • Biceps brachii: origin on the scapula, insertion on the radius. Action: flexes the elbow.
  • Deltoid: origin on the clavicle and scapula, insertion on the humerus. Action: abducts the arm (raises it to the side).
  • Quadriceps femoris: origin on the femur and pelvis, insertion on the tibia. Action: extends the knee.
  • Pectoralis major: origin on the sternum and clavicle, insertion on the humerus. Action: pulls the arm across the chest (adduction).

Posterior view (labeled muscles and actions):

  • Triceps brachii: origin on the scapula and humerus, insertion on the ulna. Action: extends the elbow.
  • Hamstrings: origin on the pelvis, insertion on the tibia and fibula. Action: flexes the knee.
  • Gastrocnemius: origin on the femur, insertion on the calcaneus via the Achilles tendon. Action: plantar-flexes the foot (points the toes).

Build check note: I used proximal and distal terms to confirm each muscle ran from its fixed origin to its moving insertion, and my group corrected the deltoid, which I had placed too low.

Why this matters

This model shows the level of evidence and organization needed to complete: Two labeled photographs (anterior and posterior views) of clay muscles placed on the model in correct origin-to-insertion position, each muscle named with the movement it produces.

Build yours step by step
  1. State the question and method.
  2. Present the observations and data with units.
  3. Explain the result, limitations, and next investigation.
Change it for a new task

Keep the structure. Replace the question, facts, measurements, and evidence. Then recheck units, vocabulary, and whether the conclusion goes beyond the evidence.

Also due today: Submit both photos with muscle labels visible.

See the full worked example
Portal terms
CER:
Claim, Evidence, Reasoning: make a claim, back it with evidence, explain your reasoning.
SOP:
Standard Operating Procedure, the exact steps to follow (especially in a lab).
Tracker:
Your PLTW progress log where you record completed evidence.
myPLTW:
The PLTW course site where you do the online activities. Find it in Clever with your Microsoft sign-in, right next to Schoology.
This unit's vocabulary

Tap the speaker to hear a term. Add two of these to your notebook glossary with a definition and an example in your own words.

Build your vocabulary · optional, for extra credit

Pick just 2 or 3 words from today and make them yours: write what each one means in your own words, name the context clue or evidence that helped, then give one example from what you actually did in Maniken muscle build. Try your own words first; the glossary is there if you get stuck. This is voluntary and counts as extra credit, so keep it short.

sarcomere
actin
myosin
contraction
tendon
origin

Saved on this device. Show Mr. Mendoza or add these to your notebook glossary to claim the extra credit.

Unit notebook (fillable)

A fillable, Cornell-style notebook for Unit 1: Road to Rehabilitation. Type your notes, cues, and summaries right in the PDF, or print it and write by hand. Each lesson page has a cue column, a notes column, and a summary box, plus dated lab-record pages you can turn in.

HBS Unit 1 notebook: Road to Rehabilitation Fillable PDFCornell notes + lab recordsOpen
Resources & readings

Vetted readings and references for this unit. Use them to prepare, to catch up if you were absent, or to go deeper on today's target.

Check yourself · commit, then reveal

Claim ceiling for this check: The supplied lesson evidence can support an observation, pattern, classroom mechanism, or next-step decision about Maniken muscle build. It cannot by itself prove causation, establish a real clinical diagnosis, or justify action outside this classroom task.

Quick self-check · commit, then reveal

The biceps brachii has its origin on the scapula and its insertion on the radius (forearm). When it contracts, which bone moves toward which, and what movement results?

How sure are you?

Write an answer and pick a confidence to unlock the key.

Cumulative WebXam review · flash practice

Fast retrieval with instant answers, not the commit-then-reveal check above. Try each from memory first: write what you remember about the earlier units, then check yourself here.

Tap an answer to check it · nothing is recorded or graded
[Review: Course Launch: PLTW access, the lab notebook, and the language of anatomy] Homeostasis is best defined as:
[Review: Beginning with Bones: regional terms, body planes, cavities, and tissues] A transverse (horizontal) plane divides the body into which two parts?
[Review: Bones: structure, fractures, and how the skeleton repairs itself] Which connective tissue structure attaches one bone to another bone at a joint?
The basic contractile unit of a skeletal muscle fiber is the:
Go further and get help
Lab · prepare, conduct, complete
1Prepare
Pre-lab pass · clear all six to go to the bench
0/6

I can name the procedure's purpose and the evidence I will record. I can identify each named hazard and the control that reduces it: Keep clay away from eyes and mouth. My data table is ready before materials are handled.

Finish the checklist before you handle any material.

Bring / set up
Maniken skeleton modelAir-dry or oil-based clay (multiple colors recommended for different muscle groups)Muscle reference sheet (origin, insertion, action for assigned group)Toothpicks or skewers for attachmentLabel flags or sticky notesCamera or phone for photos
Safety · specific to today's hazards
  • Keep clay away from eyes and mouth.
  • Wash hands before and after handling clay.
  • Do not use wire or sharp implements inside clay near the model without teacher direction.
Review Lab Safety (rules, PPE, SDS, emergencies) and check your contract + test
2Conduct (Argument-Driven Inquiry)
  1. 1Before materials are handled, identify the purpose, variables or comparison, controls, measurement units, and stop-work condition.
  2. 2Review the assigned muscle group and its origin, insertion, and action.
  3. 3Roll and place the clay muscles onto the Maniken in correct anatomical order.
  4. 4Label each muscle and state the movement it produces.
  5. 5Check your build against the reference and fix any misplacement with your group.
  6. 6Submit a photo of your labeled Maniken muscle build.
  7. 7Record each result in the prepared table before interpreting it. Mark missing, repeated, or invalid results truthfully.
  8. 8Complete the named cleanup and waste route, remove PPE safely, wash hands when required, and confirm the station is ready for the next group.
Prepare this data table before materials are handled
Trial or sample IDIndependent conditionMeasured result with unitsObservation before interpretationQuality-control note
     
     
     
Khan Academy: Muscular System
3Complete
Argue from your evidence, then compare what you predicted to what happened. Error analysis names a specific method limit, never "human error".
You predicted

Before the procedure, predict the result and cite the rule behind the prediction.

What actually happened

After the procedure, compare the result with the prediction and name one limitation or source of uncertainty.

Your lab report is graded on the rubric below, with extra weight on error analysis and method.
Where this leads: careers
What to do if you were absent
Today was a group: do this instead

Use the linked virtual muscle tour to build a labeled digital or paper muscle map of the assigned group, naming each muscle's origin, , and action, then submit it.

Learn.Genetics (Utah)

Then submit your Lab report. Turn this in at the drop folder with your district Microsoft sign-in, or hand it to Mr. Mendoza in class. Both count as submitted. Doing the activity in myPLTW does not.

If MR. MENDOZA is absent

Class still runs. Complete the online activity above (it's self-guided). Need the concept taught without a teacher? Use this authoritative explainer:

Khan Academy: Muscular System
How this is graded
For: Lab report: Two labeled photos of your Maniken muscle build (anterior and posterior views) with each muscle identified and its action stated.
  • Complete
    Every required part of the artifact is present, nothing left blank.
  • Accurate
    The science and the data are correct and match the evidence.
  • Scientific reasoning
    You explain your claim with evidence and reasoning (CER), not just an answer.
  • Professional communication
    Clear, organized, labeled, and written the way a clinician or scientist would.
  • Submitted
    Turned in the right way, on the class site or handed to Mr. Mendoza in class, and confirmed. Not in Schoology: that is where the report-card grade appears later.
  • Error analysis and method · counts double
    Name a specific limit of the method and how it moved your result, and compare what you predicted to what happened. "Human error" does not count; say what about the procedure or instrument caused it.