Which Building Blocks Must Fuse to Make a Lip and Palate?
Developmental domain · Lesson 2 of 20 · Principles of Biomedical Science (PBS)
Today's goal: Name and locate the five facial prominences and explain which prominences must grow toward each other and fuse to build a normal upper lip.
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.
Labels: frontonasal prominence (top, midline), maxillary process (left and right), mandibular process (lower pair). Nasal pits split the frontonasal into medial nasal (inner) and lateral nasal (outer) processes.
Fusion arrows: on each side, the maxillary process meets and fuses with the medial nasal process to close the lip.
Left-side X caption: Mateo's left unilateral cleft lip is best explained by a failed fusion between the left maxillary process and the left medial nasal process. The right side fused normally.
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: What are the building blocks of the face, and which ones must fuse to form a normal upper lip?
- 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: On a simple labeled diagram of the five prominences, (1) label all five blocks, (2) draw an arrow showing the that closes the upper lip on each side, and (3) on the LEFT side only, mark an X where the fusion failed for Mateo, with a one-line caption naming the two blocks that did not join.
- 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 "On a simple labeled diagram of the five prominences, (1) label all five blocks, (2) draw an arrow showing the fusion that closes the upper lip on each side, and (3) on the LEFT side only, mark an X where the fusion failed for Mateo, with a one-line caption naming the two blocks that did not join.".
- 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.