Clue 1: Orient yourself
When must one route close?
Use the labels and the picture's left-to-right, near-to-far, or before-and-after order. Name only what you can point to.
The question
Why can air escape through the nose even after the roof of the mouth has been closed?
Why it matters: Structure affects feeding, breathing, hearing, speech, teeth, and surgical planning. Care teams need to connect the exact structure to the function a child is using every day. Today you practice the professional reasoning behind that work: Clear oral speech needs a moving velopharyngeal valve that closes the nasal path for pressure sounds and opens it for nasal sounds.
On your WebXam
Linking the velopharyngeal valve and the levator sling to clear speech
For life
Having a gene is not the same as using it.
Principle: Having it is not using it
Five principles we return to
Having it is not using it
Same instructions, different switches
Same look, different cause
Change one thing and watch
Boss or doorman?
Decides the result or only allows it
Held down, not gone
Remove the brake and it returns
Many roads, one ending
One result can begin many ways
Try the everyday version first
A railway switch sends airflow down the correct track
A switch directs moving traffic into one route and closes another route. The seal matters because a leak can send part of the flow the wrong way.
Do not jump to the biology yet. Treat the picture as a small system. Track its parts, follow one change at a time, and keep more than one explanation open until the picture supplies a way to separate them.
Clue 2: Trace one change
Why should the other route remain available sometimes?
Follow one object, stage, or path. Point to the first place where the situation changes instead of jumping to the ending.
Clue 3: Keep the cause open
What signal would reveal a leaky switch?
List more than one explanation that still fits. Name the extra observation that would help you separate those possibilities.
Now inspect the illustration
Work from the visible evidence. A useful answer names the part of the picture that supports it and leaves unknown causes open.
- 1When must one route close?
- 2Why should the other route remain available sometimes?
- 3What signal would reveal a leaky switch?
Tier 1 check
Finish with the everyday model
Use the everyday picture to answer today's question in plain words: Why can air escape through the nose even after the roof of the mouth has been closed?
You can complete today's required check without opening the technical details below.
Ready for the real names? Optional tier 2
Technical rules and limits
Rule 1: Speech uses controlled airflow, not complete permanent closure.
Rule 2: Pressure consonants need oral pressure.
Rule 3: Resonance and nasal emission reveal valve performance.
Where the analogy stops: Speech depends on the brain, hearing, articulation, language, and learned motor patterns as well as anatomy.
Carry the previous idea forward
Cleft surgery timing balances present safety, early function, future growth, and family readiness rather than following one magic date.
Today's technical takeaway
Clear oral speech needs a moving velopharyngeal valve that closes the nasal path for pressure sounds and opens it for nasal sounds.
Now map the same rules onto biology
Trace airflow during oral and nasal sounds
Track switch
Velum and pharyngeal walls
Oral tunnel
Oral airflow for pressure sounds
Nasal tunnel
Nasal resonance for m, n, and ng
Educational illustration, not a clinical photograph, scan, or surgical plan. Use the labeled evidence cards and claim ceiling.
Mateo's case file: evidence supplied in this lesson
ANA11-E1
Mateo's repaired soft palate contains a reconstructed levator sling.
Why it matters: The velum has the anatomy needed to elevate, but function must be measured.
ANA11-E2
A speech sample shows pressure consonants with no consistent nasal emission.
Why it matters: The supplied sample supports effective closure during those sounds.
ANA11-E3
Speech assessment includes resonance, nasal emission, articulation, and intelligibility.
Why it matters: One sound or one appearance cannot define the whole speech outcome.
Make the clinical decision
You are the cleft-team speech-language pathologist.
Mateo produces clear pressure consonants but a trainee says the nose should be sealed for every sound.
AExplain controlled closure for oral sounds and opening for nasal sounds.
BRecommend permanent complete nasal blockage.
CJudge the valve only from a still photograph.
Choose the explanation and cite airflow plus speech-sample evidence.
Evidence required
ANA11-E1 + ANA11-E2 Claim ceiling
You may interpret the supplied educational speech sample. You may not diagnose a real child's resonance without a complete evaluation.Go deeper Optional tier 3
Everything required for today is above. Open these only if you want the explainer, source trail, or download files.
The everyday model and Tier 1 check are the complete required path for this lesson.
Use these checks to keep your place. They are not turned in through the portal.
Check off as you finish
- Worked through the everyday picture and answered its three questions.
- Completed the Tier 1 check in plain words.
Turn in: Anatomical lesson 11: How Palate Repair Lets a Child Speak
Go to Schoology to turn this in.
Submit one PDF. Put your first and last name in the document header. Name the file: FirstName LastName - Assignment Title - YYYY-MM-DD.pdf.
Open Schoology PDF upload helpIf you cannot get in, see Mr. Mendoza. Do not skip the work.
Optional legacy technical materials Open only if you want the original notes, vocabulary, artifact, and CER work
Before this page, you should know
- Lip repair is usually done at about 3 to 6 months; repair is generally favored as a one-stage repair at about 9 to 14 months, before first words.
- Three forces pull on the dates: (wait for the infant to grow for safer anesthesia), speech (the valve must work before first words), and growth ( surgery disturbs upper-jaw growth, pulling toward waiting).
If not, review
Today's new idea is only
A good repair rebuilds the muscle sling, not just the hole, because the has to move to seal off the nose during speech.
Goal: Explain how the works as a valve and why a repaired levator sling decides between clear speech and .
Know by the end
- The and the throat walls form a muscular valve, the , that closes the nose off from the mouth during speech.
- The normally forms a sling that lifts the up and back to seal that valve.
- Repairing a means taking down the muscle's and rebuilding the sling, not just closing the gap.
- When the repaired cannot seal, the child has , with and audible .
1
The valve
Model start: The soft is the , and the valve it forms with the throat walls is the ; the lifts the velum to close it.
- In normal the two levator muscles meet in the to form a ____ across the soft .
- When the closes, air goes out the ____; when it opens, air goes up the nose.
2
What repair must do
- repair is not just closing the gap; it takes down the and rebuilds the ____ so the can move.
- When the repaired cannot seal the , the child has velopharyngeal ____ (VPI).
3
The signs of a leak
- Air escaping into the nose produces ____ (the voice sounds nasal) and audible .
Everything you need for today is on this page. These links are optional.
What to read
Read the short plain-language explanation written for this lesson. Plain-language explainer for this lesson
Why this source matters
This explanation gives you the background for today's idea without making you decode a research paper: A good repair rebuilds the muscle sling, not just the hole, because the has to move to seal off the nose during speech.
Words to unlock first
velumvelopharynxlevator veli palatinivelopharyngeal insufficiency (VPI)hypernasality
Reading moves
- Skim the title and abstract first to get the gist.
- Circle the one sentence that states the main claim.
- Box the evidence the authors give for that claim.
- Mark one sentence that confuses you, and move on.
Stop point
Stop after the final 'Use it now' section. The research citations are available separately for advanced readers.
Your output
Write one claim-evidence sentence: state the main idea, then name the example or evidence that supports it.
Where this fits
Tested on (Ohio WebXam)
Genetics of Disease · 072130
PLTW lesson
MI · Anatomical domain · Muscular system; structure-function of the velopharynx in speech
WebXam domain
Molecular and Genetic Technology
Evidence to produce
You are reviewing Mateo six months after his palate repair. On a VPI risk checklist, mark which of three risk factors a wide complete cleft like his could carry: severe Veau class, cleft width over 10 mm, a residual fistula. Then write one sentence telling the family, in plain words, what you will listen for at his next visit and why early speech therapy matters.
Lab / skill
Human Body Systems (HBS) · Principles of Biomedical Science (PBS)
Everything required for today's decision is already in the case file and plain-language explainer. The links below are original papers and database records for teachers and advanced readers, not assigned student reading.
- American Cleft Palate Craniofacial Association. 2024 Parameters of Care.
- Kotlarek et al. 2020, Asymmetry and Positioning of the Levator Veli Palatini in Repaired Cleft Palate (J Speech Lang Hear Res)
- Hofman et al. 2024, Long-Term Speech Outcomes After Sommerlad Palatoplasty (Clin Oral Investig)
- MedlinePlus: Cleft lip and palate
- Claim: Repairing the well means rebuilding the muscle, not just closing the hole, because ____.
- Evidence: Give one finding from today's models or studies that supports your claim.
- Reasoning: Explain why this matters for Mateo's speech as he learns to talk.
How this is graded (rubric)
For: You are reviewing Mateo six months after his palate repair. On a VPI risk checklist, mark which of three risk factors a wide complete cleft like his could carry: severe Veau class, cleft width over 10 mm, a residual fistula. Then write one sentence telling the family, in plain words, what you will listen for at his next visit and why early speech therapy matters.
| Criterion | Proficient | Developing | Beginning |
|---|---|---|---|
| Complete | Every required part of the artifact is present and filled in. | Most parts are present, but one is missing or left blank. | Several parts are missing. |
| Accurate | The science and data are correct and match the evidence. | Mostly correct, with a small factual slip. | Key science or data is wrong. |
| Scientific reasoning (CER) | States a claim, backs it with specific evidence, and explains the reasoning. | Has a claim and evidence, but the reasoning is thin or missing. | Gives an answer with no evidence or reasoning. |
| Professional communication | Clear, organized, and labeled the way a clinician or scientist would write it. | Readable but disorganized or missing labels. | Hard to follow. |
| Submitted | Turned in through the route named under Submit here and confirmed. | Turned in, but in the wrong place or unconfirmed. | Not turned in. |
How the model answer scores against this rubric
- CompleteProficient: Nothing is left blank: the model fills every part of "You are reviewing Mateo six months after his palate repair. On a VPI risk checklist, mark which of three risk factors a wide complete cleft like his could carry: severe Veau class, cleft width over 10 mm, a residual fistula. Then write one sentence telling the family, in plain words, what you will listen for at his next visit and why early speech therapy matters.".
- AccurateProficient: Every number and claim matches the case evidence.
- Scientific reasoning (CER)Proficient: It names a claim, cites the specific evidence, and explains the reasoning, not just the answer.
- Professional communicationProficient: It is organized and labeled like a real chart note.
- SubmittedProficient: It would be attached to your class form or handed in, and confirmed.
What's next: We answered why repair decides clear speech. But here is a new clue: the muscles that move Mateo's soft palate are anchored near the skull base, right next to the tube that drains his . If those same muscles are abnormal, what happens to his ears? We chase that next time.