Embryology

Question 1

What are the nerve contents of the pharyngeal arches?

Answer 1

I=Trigeminal
II=Facial
III= Glossopharyngeal
IV=Vagus
VI=Vagus

Question 2

What are the Arterial contents of the pharyngeal arches?

Answer 2

I=Maxillary a
II= Stapedial then corticotympanic in adults
III= Carotid artery
IV= Aorta R subclavian
VI= Pulmonary

Question 3

What are the cartilage contents in pharyngeal arches I and II?

Answer 3

I= Meckels artilage, Malleus, Incus
II= Reicherts cartilage, stapes, stylo things, lesser hyoid

Question 4

What are the muscle contents of the pharyngeal arches?

Answer 4

I= Mastication muscles
II= Stapedius, stylohyoid, p digastric, auricualr and muscles of facial expression
III= Stylopharyngeus
IV= Cirothyroid, levator veli palatini, constrictors
VI: Intrisic muscles of larynx

Question 5

Cleft I forms what?

Answer 5

External auditory meatus.

Question 6

Cevical cysts form where? Tyroglossal duct cysts?

Answer 6

Cervical=Lateral side of the neck.

Thryroglossal= Midline

Question 7

Pouches 1-4 will form what?

Answer 7

1=Pharyngotympanic tube
2=Palatine tonsils
3= Inferior parathyroid and thymus
4= superior parathyroid and ultimo branchial body

Question 8

How does the thyroid form?

Answer 8

Migrates from foramen cecum down, forming the thyroglossal duct.

Question 9

oral part of the tongue forms from what? Pharyngeal?

Answer 9

Oral= Lateral lingual swellings, tuberculum impar.

Pharyn=Copula/hypobranchial eminence

Question 10

Neruocranium is made from? viscero?

Answer 10

N= Mixes of neural and somites
V= All neural crest

Question 11

Primary palate is formed from? Secondary?

Answer 11

P= Intermaxillary segment

S=Lateral Palatal processes/shelfs