Face and Pharynx Development

Question 1

What is the embryonic pharynx?

Answer 1

the anterior end of the foregut

Question 2

What is the oropharyngeal membrane made up of?

Answer 2

pharyngeal endoderm and surface ectoderm

Question 3

How many pharyngeal arches are evident?

Answer 3

3 (6 develop)

Question 4

What dose each pharyngeal arch contain?

Answer 4

aortic arch vessel, ectomesenchyme from neural crest, myotomes, one cranial nerve innervation

Question 5

What do pharyngeal arches contribute to the formation of?

Answer 5

jaws, larynx, hyoid bone, head muscles

Question 6

What does the first pharyngeal pouch develop into?

Answer 6

tympanic cavity (middle ear) and auditory tube

Question 7

What dose the second pharyngeal pouch develop into?

Answer 7

fossa of palantine tonsil and semilunar fold

Question 8

What is formed by the first pharyngeal arch?

Answer 8

lower jaw and much of upper jaw (mandibular and maxillary processes)

Question 9

What is formed by the frontonasal prominence?

Answer 9

nose, nasal cavity, primary palate, forehead, upper incisor region (ectomesenchyme from neural crest)

Question 10

What are the 2 parts of the frontonasal prominence?

Answer 10

frontal prominence and medial/lateral nasal processes

Question 11

What do the medial nasal processes form?

Answer 11

primary palate and nasal septum

Question 12

What does the primary palate become?

Answer 12

incisive bone, upper incisors and upper lip

Question 13

What do the lateral nasal processes give rise to?

Answer 13

alar cartilage of nose, nasal bone, lacrimal bone

Question 14

What forms the nasolacrimal duct?

Answer 14

where the lateral nasal process meets the maxillary process of 1st pharyngeal arch

Question 15

What forms the secondary palate?

Answer 15

extensions of the maxillary process called palatine extensions that meet at midline

Question 16

What forms the soft palate?

Answer 16

caudal extension of the hard palate (secondary palate)

Question 17

What does primary cleft palate produce?

Answer 17

hare lip

Question 18

What is formed by the frontonasal prominence?

Answer 18

nose, nasal cavity, primary palate, forehead, upper incisor region (ectomesenchyme from neural crest)

Question 19

What are the 2 parts of the frontonasal prominence?

Answer 19

frontal prominence and medial/lateral nasal processes

Question 20

What are the 2 parts of the frontonasal prominence?

Answer 20

frontal prominence and medial/lateral nasal processes

Question 21

What do the medial nasal processes form?

Answer 21

primary palate and nasal septum

Question 22

What do the medial nasal processes form?

Answer 22

primary palate and nasal septum

Question 23

What does the primary palate become?

Answer 23

incisive bone, upper incisors and upper lip

Question 24

What does the primary palate become?

Answer 24

incisive bone, upper incisors and upper lip

Question 25

What do the lateral nasal processes give rise to?

Answer 25

alar cartilage of nose, nasal bone, lacrimal bone

Question 26

What do the lateral nasal processes give rise to?

Answer 26

alar cartilage of nose, nasal bone, lacrimal bone

Question 27

How is the vestibule of the mouth formed?

Answer 27

labiogingival lamina from ectoderm, becomes labiogingival groove, sides form lips and gingiva

Question 27

What forms the nasolacrimal duct?

Answer 27

where the lateral nasal process meets the maxillary process of 1st pharyngeal arch

Question 28

What forms the nasolacrimal duct?

Answer 28

where the lateral nasal process meets the maxillary process of 1st pharyngeal arch

Question 28

What are the steps of tooth formation?

Answer 28

dental lamina from ectoderm, dental buds, cup shaped enamel organ, ectomesenchyme becomes dental papilla

Question 29

What forms the secondary palate?

Answer 29

extensions of the maxillary process called palatine extensions that meet at midline

Question 29

What are odontoblasts?

Answer 29

an epithelial layer that deposits dentin in tooth development

Question 30

What forms the soft palate?

Answer 30

caudal extension of the hard palate (secondary palate)

Question 30

What are ameloblasts?

Answer 30

epithelium that forms enamel in tooth development

Question 31

What does primary cleft palate produce?

Answer 31

hare lip

Question 31

If deciduous, where does the permanent replacement develop?

Answer 31

superficial and medial to other bud

Question 32

What do the distal swellings of the pharynx form?

Answer 32

body and apex of the tongue with ectodermal covering

Question 33

What does the proximal swelling of the pharynx form?

Answer 33

root of the tongue with endoderm

Question 34

What do the muscles of the tongue originate from?

Answer 34

occipital somites