HY embryo II Flashcards

1
Q

1st arch derivatives of ear

A

malleus
incus
tensor tympani

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2
Q

2nd arch derivatives of ear

A

stapes

stapedius

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3
Q

1st cleft derivatives of ear

A

external acoustic meatus

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4
Q

1st pouch derivatives of ear

A

pharyngotympanic tube

middle ear cavity

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5
Q

otic placode derivatives of ear

A

membranous labyrinth in inner ear

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6
Q

tympanic membrane forms at interface of …

A

1st pouch and cleft

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7
Q

hyoid bone

arch?

A

upper pt: 2nd arch

lower pt: 3rd arch

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8
Q

taste buds/mucosa of tongue is derived from which pharyngeal arches?

A

1st-4th pharyngeal arches

*NOT muscles

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9
Q

epiglottis

arch?

A

4th arch

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10
Q

posterior 1/3 tongue

arch?

A

3rd arch

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11
Q

anterior 2/3 tongue (gen sensory)

arch?

A

1st arch

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12
Q

anterior 2/3 tongue (taste)

arch?

A

2nd arch

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13
Q

Are tongue muscles are derived from pharyngeal arches?

A

NO

derived from occipital somites

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14
Q

middle ear (tympanic cavity) is derived from the extension of which pharyngeal pouch?

…therefore continuous w/ what?

A

1st pharyngeal pouch

therefore continuous anteriorly w/ pharynx via pharyngotympanic tube and posteriorly w/ mastoid air cells

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