2nd Sem M2 Embryo Flashcards
1
Q
Inner ear forms from Layer
A
Ectodermal Origin
1
Q
Middle ear forms from Layer
A
Endodermal Origin
2
Q
Auditory ossicles form from
A
Neural Crest
3
Q
External ear forms from
A
Ectodermal Origin
4
Q
Is the inner ear of Placodal origin?
A
Yes
Ottic Placode
5
Q
Otic Vesicle Ventral part
A
- Saccule
- Cochlear Duct
6
Q
Otic Vesicle Dorsal part
A
- Utricle
- Endolymphatic Duct
7
Q
Tympanic Cavity Origin
A
Lateral Part of 1st Pharyngeal Pouch
8
Q
Auditory Tube Origin
A
Medial part of 1st Pharyngeal Pouch
9
Q
Malleus and Incus Origin
A
1st Pharyngeal Arch
Meckel’s Cartilage
10
Q
Stapes Origin
A
2nd Pharyngeal Arch
Reichert’s Cartilage
11
Q
What is Eye field categorization and separation based on?
A
- EN1
- PAX
12
Q
What inhibits brain for extra optic generation?
A
SHH
(Malformations due to low sonic hedgehog genes)
13
Q
What derives from Surface Ectoderm
(EYE)
A
- Cornea
- Conjuntiva
- Lens
- Lacrimal Gland
14
Q
What derives from Mesenchyme
(EYE)
A
- Sclera
- Choroid
- Meninges
- Pupillary membrane
