03.2 Development of the Nose and Face

Question 1

What “fourth germ lineage” contributes to head and neck structures by migrating into mesoderm?

Answer 1

Neuroectoderm

Question 2

What does the frontal nasal prominence become?

Answer 2

Forehead
Nose
Philtrum

Question 3

What does he maxillary prominence become?

Answer 3

Cheeks
Lateral upper lip
Lateral upper jaw

Question 4

What does the mandibular prominence become?

Answer 4

Lower lip

Jaw

Question 5

What pushes the nasal prominences together?

Answer 5

Maxillary prominences grow medially

Question 6

What forms the primary palate?

Answer 6

Maxillary prominences fusing together

Question 7

What forms the secondary palate?

Answer 7

Palatal shelves fuse

Question 8

What forms the retina?

Answer 8

Forebrain

Question 9

What forms the lens?

Answer 9

Optic placode

Question 10

What forms the external auditory meatus?

Answer 10

1st pharyngeal cleft

Question 11

Where do the external ears form originally and how do they move to their final point?

Answer 11

In the neck

As mandible grows the ears ascend

Question 12

What forms the inner ear?

Answer 12

Otic placode