Face development

Question 1

In the center of this area is a depression in the ectoderm known as the?

Answer 1

stomodeum

Question 2

In the floor of the depression is the

Answer 2

buccopharyngeal
membrane

Question 3

By the 4th week, the buccopharyngeal membrane breaks down so that the stomodeum communicates with the

Answer 3

foregut.

Question 4

begins as a proliferation of mesenchyme on the ventral surface of the developing brain, and this grows toward the stomodeum.

Answer 4

frontonasal process

Question 5

grows out from the upper end of each first arch and
passes medially, forming the lower border of the developing orbit.

Answer 5

maxillary process

Question 6

approach one another in the
midline below the stomodeum and fuse to form the lower jaw and lower lip.

Answer 6

mandibular processes

Question 7

appear as depressions in the lower edge of the advancing frontonasal process

Answer 7

olfactory pits

Question 8

2 divisions of olfactory pits

Answer 8

medial and lateral nasal processes