exam 4

Question 1

pharyngeal pouches

Answer 1

internal space between arches

Question 2

pharyngeal clefts/grooves

Answer 2

external space between arches

Question 3

first arch cartilage dorsal end derivatives

Answer 3

malleus and incus bones

Question 4

first arch ventral end derivatives

Answer 4

primoridium of mandible

Question 5

first arch middle part cartilage derivatives

Answer 5

anterior ligament of malleus + sphenomandibular ligament

Question 6

second arch cartilage derivatives

Answer 6

stapes, styloid process, stylohyoid ligament, lesser cornu of hyoid bone, and superior body of hyoid bone

Question 7

third arch cartilage derivatives

Answer 7

greater cornu + inferior body of hyoid bone

Question 8

first arch muscle derivatives

Answer 8

muscles of mastication

Question 9

second arch muscle derivatives

Answer 9

stapedius, stylohyoid muscle, posterior belly of digastric, auricular, muscles of facial expression

Question 10

third arch muscle derivatives

Answer 10

stylopharyngeus

Question 11

fourth arch muscle derivatives

Answer 11

cricothyroid, levator veli palatini, + constrictors of the pharynx

Question 12

sixth arch muscle derivatives

Answer 12

intrinsic muscles of the larynx

Question 13

first arch nerve derivatives

Answer 13

maxillary + mandibular branches of trigeminal n (CN V)

Question 14

second arch nerve derivatives

Answer 14

facial n (CN VII)

Question 15

third arch nerve derivatives

Answer 15

glossopharyngeal n (CN IX)

Question 16

4-6 arch nerve derivatives

Answer 16

superior laryngeal n + recurrent laryngeal n

Question 17

is mesoderm present in pouches/grooves?

Answer 17

no, just ectoderm and endoderm

Question 18

what are pharyngeal grooves made of?

Answer 18

ectoderm

Question 19

what are pharyngeal pouches made of?

Answer 19

endoderm

Question 20

first pharyngeal membrane becomes…

Answer 20

tympanic membrane

Question 21

development of thyroid

Answer 21

thickening of floor of pharynx

Question 22

pouch 2 derivative

Answer 22

tonsils

Question 23

pouch 3 derivatives

Answer 23

develops into inferior parathyroid + thymus

Question 24

pouch 4 derivatives

Answer 24

develops into superior parathyroid

Question 25

anterior 2/3 of tongue comes from…

Answer 25

tuberculum impar merged with lateral lingual swellings

Question 26

posterior 1/3 of tongue comes from…

Answer 26

2, 3, 4 pharyngeal arches

Question 27

upper respiratory system

Answer 27

nasal cavity, paranasal sinuses, pharynx

Question 28

where does the upper respiratory system come from?

Answer 28

head and pharyngeal apparatus

Question 29

lower respiratory system

Answer 29

larynx, trachea, main bronchi, lungs

Question 30

where does the lower respiratory system come from?

Answer 30

from foregut

Question 31

when does the lower respiratory system begin to develop?

Answer 31

during the 4th week

Question 32

what tissue does the connective tissue, cartilage, + smooth muscle develop from in the respiratory tract?

Answer 32

splanchnic mesoderm

Question 33

when does the respiratory diverticulum (lung bud) form?

Answer 33

week 4

Question 34

where does the globular tracheal bud form from?

Answer 34

the distal end of the diverticulum

Question 35

what does the ventral part of the cranial foregut develop into?

Answer 35

laryngotracheal tube

Question 36

what does the dorsal part of the cranial foregut develop into?

Answer 36

primordium of oropharynx + esophagus

Question 37

the epithelial lining of the larynx develops from the?

Answer 37

endoderm

Question 38

the cartilages of the larynx develop from the?

Answer 38

4th + 6th pairs of pharyngeal arches

Question 39

when does recanalization of the larynx occur?

Answer 39

10th week

Question 40

what does the epiglottis develop from?

Answer 40

caudal part of the hypopharyngeal eminence

Question 41

what arches develop the epiglottis?

Answer 41

3rd and 4th pharyngeal arches

Question 42

what is the trachea developed from?