Facial Development-Exam III

Question 1

What is another name for the embryonic mouth?

Answer 1

StoMoDeum

Question 2

What type of “derm” are the nasal placodes?

Answer 2

Thickenings of Ectoderm

Question 3

How are the lateral and medial nasal prominences developed?

Answer 3

The nasal PLACODES invaginate to form NASAL PITS. The nasal pits then THICKEN to form the lateral and medial nasal prominences.

Question 4

What structures fuse to make the upper lip? What main structure is NOT a part in this?

Answer 4

The medial nasal prominences and the maxillary prominences come together to make the upper lip. The Lateral Nasal Prominences do not take part in forming the upper lip.

Question 5

What is the origin of the NasoLacrimal Duct?

Answer 5

The nasolacrimal groove forms the nasolacrimal duct

Question 6

What are the 5 prominences that form the nose?

Answer 6

1.Frontal Prominence (Bridge of Nose) 2&3. Medial Nasal Prominences 4&5. The Lateral Nasal Prominences

Question 7

What merges to make the triangular Primary Palate?

Answer 7

The medal nasal prominences

Question 8

What are the 3 parts of the inter maxillary segment? (the merger of the medial nasal prominences)

Answer 8

Incisiors, Philtrum, Primary Palate

Question 9

What is the landmark between the primary and secondary palates?

Answer 9

The incisive foramen

Question 10

What are USUALLY the causes to clefts anterior to the incisive foramen?

Answer 10

The lack of fusion of the maxillary prominence with the medial nasal prominence on one or both sides

Question 11

What is usually the cause for a cleft posterior to the incisive foramen?

Answer 11

Lack of fusion of palatine shelves

Question 12

What is more frequent? A cleft palate or a cleft lip?

Answer 12

A cleft LIP is more frequent

Question 13

Which sex is most affected by cleft lip?

Answer 13

Males