The Anatomy of the Cleft, What Is Actually Interrupted
Anatomical domain · Lesson 3 of 20 · Human Body Systems (HBS)
Today's goal: Explain that a cleft is a gap where tissue failed to join, and that the muscles insert abnormally and pull the wrong way (displaced orbicularis oris in the lip, displaced levator veli palatini in the palate).
What a finished product looks like
This is a model of the work you should turn in. Use it to check your own: match the structure and the level of detail, do not copy it. Your wording should be your own.
Orbicularis oris: Normal = unbroken ring crossing the upper-lip midline, seals the lips. Mateo = ring interrupted at the cleft; fibers turn and insert up the cleft margins toward the nostril and columella base, so the lip is pulled apart.
Levator veli palatini: Normal = paired fibers join in the midline as a transverse, side-to-side sling that lifts the velum. Mateo = no sling; fibers run front to back and insert onto the back of the hard palate, so the palate cannot lift.
Why repair the muscle, not just the skin: closing skin over the gap would leave both muscles pointed the wrong way, so the lip still could not seal and the palate still could not lift.
How this was built, step by step
The finished product above did not appear all at once. Here is the path from the question to the turned-in work, so you can follow the same steps.
- 1Start from today's question: In a , what exactly is the gap, and what happens to the and the ?
- 2Work the Model and the Explore questions to reason it out before writing anything.
- 3Pull the specific evidence the product needs from the reading and any database you used.
- 4Write it up in the required format: Make a two-column "Normal vs Mateo" chart for the and the . For each muscle, write (1) the normal direction and continuity from Lesson 2 and (2) what happens to it in a . End with one sentence: why must repair fix the muscle, not just the skin?
- 5Check it against the rubric, then submit.
| 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 the right way (Schoology for routine work) and confirmed. | Turned in, but in the wrong place or unconfirmed. | Not turned in. |
- CompleteProficient: Nothing is left blank: the model fills every part of "Make a two-column "Normal vs Mateo" chart for the orbicularis oris and the levator veli palatini. For each muscle, write (1) the normal direction and continuity from Lesson 2 and (2) what happens to it in a cleft. End with one sentence: why must repair fix the muscle, not just the skin?".
- 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 turned in on Schoology and confirmed.
WebXam problem for today's skill
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.