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Structures > Branchial arches > Flashcards

Branchial arches Flashcards

1
Q

What does “branchial” mean?

A

Related to gills

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2
Q

What are the 4 components of the brachial apparatus

A
  1. branchial arches
  2. pharyngeal pouches
  3. branchial grooves
  4. branchial membranes
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3
Q

How many swellings are visible by day 28?

A

4, although there are 6 arches

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4
Q

Which 2 arches are closely related?

A

4 and 6

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5
Q

Which cells migrate to the branchial arches?

A

neural crest cells

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6
Q

what are the 4 components of the branchial arch?

A
  1. nerve
  2. muscles derived from mesenchyme
  3. skeletal/ cartilage component
  4. artery (derivatives of aortic arch)
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7
Q

Nerve of the 1st arch?

A

Trigeminal V

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8
Q

Nerve of the 2nd arch?

A

Facial

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9
Q

Nerve of the 3rd arch?

A

glossopharyngeal

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10
Q

nerve of the 4th arch?

A

vagus

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11
Q

nerve of the 5th and 6th arches?

A

cranial root of the accessory n.

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12
Q

From which 2 structures are muscles of the head and neck derived?

A
  1. branchial arches- branchial muscles

2. Somites

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13
Q

Skeletal component of arch 1?

A

Meckel’s cartilage, precursor of mandible, malleus, incus, sphenomandibular ligament

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14
Q

Skeletal component of 2nd arch?

A

stapes, styloid process, stylohyoid ligament

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15
Q

Skeletal component of 3rd arch?

A

hyoid bone

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16
Q

Skeletal component of 4-6th arch?

A

laryngeal cartilage

17
Q

Muscles of arch 1?

A

muscles of mastication, mylohyoid, anterior belly of digastric, tensor veli palatini, tensor tympani

18
Q

What are the 4 muscles of mastication?

A

Temporalis, masseter, medial and lateral pterygoid

19
Q

Muscles of arch 2?

A

facial expression, stapedius, stylohyoid, posterior belly of digastric, plastysma, buccinator, auricular, occipitofrontalis

20
Q

muscles of arch 3?

A

stylopharyngeus

21
Q

muscles of arch 4-6?

A

cricothyroid, levator veli palatini, pharyngeal constrictors, palatoglossus, salpingopharyngeus, palatopharyngeus

22
Q

artery of arch 1?

A

1st pair of aortic arches

Structures (22 decks)

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