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Year 2 > Embryology > Flashcards

Embryology Flashcards

1
Q

What structures make up the pharyngeal arches?

A

core of mesenchyme from the mesoderm
neural crest cells
cranial nerve
artery

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2
Q

What germ layer lines the deep pharyngeal clefts?

A

ectoderm

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3
Q

What germ layer lines the pharyngeal pouches?

A

endoderm

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4
Q

What cranial nerve is associated with the first pharyngeal arch?

A

V

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5
Q

What cranial nerve is associated with the second pharyngeal arch?

A

VII

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6
Q

What cranial nerve is associated with the third pharyngeal arch?

A

IX

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7
Q

What cranial nerve is associated with the fourth and sixth pharyngeal arch?

A

X

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8
Q

Where are the cranial nerve derived from?

A

Neural tube

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9
Q

What are the two skeletal components of the first pharyngeal arch?

A

maxillary process

mandibular process

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10
Q

What bones are derived from the maxillary process of the first pharyngeal arch?

A

maxilla
zygoma
part of the temporal

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11
Q

What bones are derived from the mandibular process of the first pharyngeal arch?

A

mandible
incus
malleus

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12
Q

What muscles arise from the first pharyngeal arch?

A 
muscles of mastication
anterior belly of digastric
mylohyoid
tensor tympani
tensor palatini
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13
Q

What bones are formed from the second pharyngeal arch?

A

stapes
styloid process of temporal bone
lesser horn and upper part of the body of the hyoid.

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14
Q

What muscles are formed from the second pharyngeal arch?

A 
muscles of facial expression
stapedius
stylohyoid
posterior belly of digastric
auricular muscles
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15
Q

What bones are formed from the third pharyngeal arch?

A

greater horn and lower part of the hyoid

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16
Q

What muscles are formed by the third pharyngeal arch?

A

stylopharyngeus

17
Q

What cartilages are formed by the fourth and sixth pharyngeal arches?

A

thyroid cartilage

cricothyroid cartilage

18
Q

What muscles are formed by the fourth pharyngeal arch?

A

cricothyroid
levator palatini
pharyngeal constrictors

19
Q

What muscles are formed by the sixth pharyngeal arch?

A

intrinsic laryngeal muscles

20
Q

What structure is formed by the first pharyngeal cleft?

A

external auditory meatus

21
Q

Which pharyngeal pouch forms the middle ear, eustachian tube and tympanic membrane?

A

first

22
Q

Which pharyngeal pouch forms the palatine tonsil?

A

second

23
Q

What structures are formed by the third pharyngeal pouch?

A

inferior parathyroid gland

thymus

24
Q

Which pharyngeal pouch forms the superior parathyroid gland and the parafollicular cells of the thyroid?

A

fourth

25
Q

Which structure gives rise to the inner ear?

A

Otic vesicles

26
Q

Which pharyngeal arches form the auricle?

A

first and second

Year 2 (6 decks)

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