Body planes and cavities
Open your materials, follow the steps, then turn in your work.
Identify the body planes and major cavities and the organs each contains.
1. Open your materials
Use the materials named in the first step below. Open lesson resources.
2. Start the work
Read the notes on the sagittal, frontal (coronal), and transverse planes.
Show all 5 required steps
- Read the notes on the sagittal, frontal (coronal), and transverse planes.
- Label the dorsal and ventral cavities and their subdivisions on a diagram.
- Complete the PLTW online task matching organs to their cavities.
- List which plane you would use to separate left from right, front from back, and top from bottom.
- Submit your labeled planes-and-cavities diagram.
Lost your place? Interrupted? Check your diagram. No planes labeled yet? Start at step 1 and label sagittal, frontal, and transverse. Planes done but cavities blank? Do step 2, labeling dorsal and ventral and their subdivisions, then finish the organ-matching task.
Check your work before submitting
- You can name the plane that produces a given body section.
- You can place a major organ in its correct cavity.
3. Turn in your work
DueCheck Schoology- Hand in
- Labeled body-planes and body-cavities diagram with at least one organ placed in each major cavity.
How to submit and name your file
Submit a photo of your completed, dated notebook diagram.
In Schoology, open your course and the assignment for this lesson. Attach your file, select Submit, and check that it appears in the submission.
PDF upload helpYou get two school days for every day you were absent, so this deadline moves with you.
Choose your Schoology section. Open only one assignment.
Check the section number beside Human Anatomy and Physiology in Schoology.
Assignment: Wk3 Lab notebook: Body planes and cavities
Link will not open? Open Schoology, choose your section, and find the assignment title above.
How this lesson connects
Direction words → planes and cavities on one dated diagram → next, a precise location. Name the plane by what it separates; place the organ by its cavity.
Unit 1 guide: what to keep and use nextNeed help? Warm-up, timing, and directions▸
💡 Big idea: Radiologists and surgeons name a location by plane and because a plane says which direction a view is cut and a cavity says which region a finding sits in; the terms narrow where to look, and the exact organ or finding still has to be named on its own.
- 0-8Intro: planes and CT views
- 8-25Notes: three planes and dorsal/ventral subdivisions
- 25-45PLTW online task: match organs to cavities
- 45-62Label planes-and-cavities diagram with organ examples
- 62-75Partner check: quiz each other on plane and names
- 75-80Submit diagram; preview types next class
- • Yesterday we argued about who owns a medical image. Today we learn how to read one.
- • Medical images are read along named planes. A CT study, for example, is built from slices that can be rebuilt in other planes, so the imaging method alone does not name the plane you are looking at.
- • We are also going to learn which organs live in which body . That matters for understanding where pain originates and where infections spread.
- • Your diagram today is the reference you will use every time we analyze a patient case this unit.
- • The three anatomical planes: (left/right), /coronal (front/back), and (top/bottom).
- • The dorsal contains the cranial and spinal cavities; the ventral cavity contains the thoracic and abdominopelvic cavities.
- • Radiologists and surgeons use plane and terms to say which direction a view is cut and which region a finding sits in; the terms narrow the location and do not name an exact organ or finding on their own.
PLTW connection and today's work
Work through the Activity 1.1.2 Language of Anatomy (Lesson 1.1 Beginning With Bones) organ-and-cavity matching task in myPLTW; complete all matching items during the work window.
Today's stopping point: Introductory task is done from the directional-terms class; the organ-cavity task should be checked off by end of today.
PLTW activity titles identify the course connection. If your account will not open, use the posted materials for today and tell Mr. Mendoza. Do not mark an online activity complete unless you completed it.
Course connection
- Activity 1.1.2 Language of Anatomy
Use the turn-in directions at the top of this page. Do not create a second submission unless your teacher asks for one.
Show another explanation or a smaller first step
Need help? Choose a starting point
Lesson resources: reading, slides, and vocabulary▸
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.
Medical images can point back to one specific person, so using them to teach is always a trade between educational benefit and that person's right to privacy, never a purely technical decision.
Radiologists and surgeons name a location by plane and because a plane says which direction a view is cut and a cavity says which region a finding sits in; the terms narrow where to look, and the exact organ or finding still has to be named on its own.
Driving question: A radiology report says a mass sits 'in the ventral , best seen on the plane.' Which organs are in play, and what slice of the body would actually show it?
What you already know: You can point to your own front, back, left and right in anatomical position. Your notes and F1 name the planes and cavities before you draw.
New idea: Radiologists and surgeons name a location by plane and because a plane says which direction a view is cut and a cavity says which region a finding sits in; the terms narrow where to look, and the exact organ or finding still has to be named on its own.
Visual or model: F1. F1 shows the three planes through one body in anatomical position and outlines the dorsal and ventral cavities. Your diagram follows it: planes by what they separate, cavities with their subdivisions, one organ in each major cavity. What to notice: Name the plane by what it separates. Place the organ by the cavity it sits in.
- Read your plane notes and find each plane on F1: the slice and the two portions it separates.
- Outline the dorsal and ventral cavities on your diagram and label their subdivisions from F1.
- Place at least one organ from the examples in your notes in each major , in its subdivision.
- Write the three which-plane lines, then date the page and photograph it with every label readable.
Real biomedical example: A report that names the plane and can be followed by another reader without the images; the diagram you draw today is that shared language. Source: Anatomical Terminology: planes and body cavities.
What the evidence supports: F1 and your notes, including the organ examples in E2, support the one product: a dated, labeled diagram submitted as one photo.
What it cannot prove: A labeled diagram cannot show a real patient's organs, a mass, or which scan to order.
- • Anatomical position: Standing upright, arms at the sides, palms forward. Every plane and direction word assumes this pose.
- • plane: An imaginary vertical surface that separates left from right; a section is the cut made along it. Midsagittal runs through the .
- • (coronal) plane: An imaginary vertical surface that separates (front) from (back).
- • plane: An imaginary surface that separates (upper) from (lower).
- • Dorsal : The space toward the back that holds the cranial and the spinal cavity.
- • Ventral : The space toward the front that holds the thoracic and the abdominopelvic cavity, separated by the diaphragm.
- • Diaphragm: The muscle sheet between the thoracic and abdominopelvic cavities.
Use it now: Use F1 for the first question and your notes for the second: which plane separates the front of the body from the back, and which ventral subdivision do your notes place the lungs in?
Go further, optional: The OpenStax and SEER pages add context on planes and cavities. F1 and your notes supply everything the diagram needs.
Your notes on the three planes: each is an imaginary flat surface named by the two portions it separates; a section is the cut made along it. F1 draws all three on one body in anatomical position.
Limit: The notes and figure name planes; they do not say which plane a given scan used. That comes from the image's own label.
F1 shows the cavities and subdivisions. Your notes pair each with an example organ: dorsal, cranial: brain; dorsal, spinal: spinal cord; ventral, thoracic: heart and lungs; ventral, abdominopelvic: stomach and intestines.
Limit: F1 names no organ; the pairings are reference knowledge. One organ per major is required; an example shows position, not size, function, or disease.
No patient scan, image, or measurement is supplied today; the composite case gives a location in words only. The diagram is a reference drawing, not a finding.
Limit: Label planes by the portions they separate and place organs in the your figure shows. A labeled diagram cannot show a real patient's organs, a mass, or which scan to order.
HBS-PLANES-D · Simulated classroom evidence scenario
Your role: student labeling a planes-and-cavities diagram from F1 and your notes
Decision: A partner put the heart in the dorsal , behind the breastbone, and left the abdominopelvic cavity empty until a scan shows an organ. Decide how your diagram places each organ.
- • Leave the abdominopelvic empty until a scan shows which organ is inside it.
- • Label each plane by the two portions it separates and place every organ in the subdivision your notes list.
- • Put the heart in the dorsal because dorsal means back and the heart sits behind the breastbone.
Response: One photo of your completed, dated notebook diagram, submitted in your section's Wk3 Lab notebook: Body planes and cavities assignment by its posted deadline. The choice discussion is preparation, not another submission.
Claim ceiling: Label planes by the portions they separate and place organs in the your figure shows. A labeled diagram cannot show a real patient's organs, a mass, or which scan to order.
Reason for review: A report locates a finding by and plane; a second reader with the report alone and a planes-and-cavities diagram must say what those words fix and what they leave open.
Context: A composite teaching case, not a real patient. Its whole content is the location language the diagram teaches.
- • A radiology report names a finding in the ventral , best seen on the plane.
- • A reader who has not seen the images uses a planes-and-cavities diagram and the organ examples to say which subdivisions could be in view.
- • The report names a , not an organ or a subdivision.
- • The report names the plane that shows the finding, not its size, depth or cause.
- • The diagram shows the ventral 's two subdivisions; the example organs for each come from your notes, not from the figure.
Measurements: No measurements are supplied. The report gives a location in words, not a size, and this case supplies no image.
Figure finding: Ventral , plane. The organs in view depend on the subdivision, which the report does not name.
Uncertainty: The report does not say which subdivision, which organ, or what the finding is; the diagram cannot supply any of that.
Students often think Students think the dorsal (back) and ventral (front) cavity split the body into a simple back-half and front-half, each holding whatever is near it.. The trap: That is the trap: the dorsal is small and specific (only the brain in the cranial cavity and the spinal cord in the spinal cavity), while nearly all the big organs (heart, lungs, stomach, intestines) sit in the ventral cavity, so 'back' does not mean 'everything behind the middle.'
Planes (labeled on the figure):
- Sagittal plane: divides the body into left and right.
- Frontal (coronal) plane: divides the body into anterior (front) and posterior (back).
- Transverse plane: divides the body into superior (top) and inferior (bottom).
Cavities (labeled with one organ each):
- Dorsal cavity: cranial cavity holds the brain; spinal cavity holds the spinal cord.
- Ventral cavity: thoracic cavity holds the heart and lungs; abdominopelvic cavity holds the stomach, intestines, and bladder.
Quick reference I wrote on the page:
- Separate left from right: sagittal plane.
- Separate front from back: frontal (coronal) plane.
- Separate top from bottom: transverse plane.
| Cavity | Subdivision | Example organ |
|---|---|---|
| Dorsal | Cranial | Brain |
| Dorsal | Spinal | Spinal cord |
| Ventral | Thoracic | Heart, lungs |
| Ventral | Abdominopelvic | Stomach, intestines |
This model shows the level of evidence and organization needed to complete: A dated, labeled diagram identifying the three anatomical planes and the major body cavities, with at least one organ placed in each major cavity.
- Date and label the entry.
- Record the procedure, observation, or design decision clearly.
- End with what the evidence means and the next step.
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 a photo of your completed, dated notebook diagram.
- 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.
Practice: try a question, then check your answer▸
Claim ceiling for this check: Label planes by the portions they separate and place organs in the your figure shows. A labeled diagram cannot show a real patient's organs, a mass, or which scan to order.
A surgeon needs to reach the stomach. Which major cavity does it lie in, dorsal or ventral, and name the subdivision.
Write an answer and pick a confidence to unlock the key.
Missed class or ready for more?▸
What today's skills lead to. These are real health-science careers this course builds toward. Tap one to see, on the US Department of Labor's O*NET site, what the job actually involves, what it pays, and how fast it is growing.
The that become most of the bone and of the face.
Goes with: The cells that build the face
The master switch: how a cell decides to become bone rather than something else.
Goes with: The master switch: how a cell chooses its fate
How a seam disappears: EMT and let palatal shelves fuse.
Goes with: When palatal shelves meet: the seam must disappear
Today is individual work you can do from home: complete the same target above, then submit your Notebook check.
Submit a photo of your completed, dated notebook diagram.
Class still runs. Complete the online activity above (it's self-guided). Need the concept taught without a teacher? Use this authoritative explainer:
Figure F1: body planes and cavitiesHow I will check this work
- You can name the plane that produces a given body section.
- You can place a major organ in its correct cavity.
Label planes by the portions they separate and place organs in the cavity your figure shows. A labeled diagram cannot show a real patient's organs, a mass, or which scan to order. Use the Schoology assignment linked above to submit it.
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