Eye and Ear development Flashcards Preview

Anatomy Unit 2 > Eye and Ear development > Flashcards

Flashcards in Eye and Ear development Deck (23):
1

at 22 days the eye first appears as what?

optic grooves on the sides of the forebrain (that will later develop into optic vesicles)

2

optic vesicles

pocketing that form out of the grooves once the neural tube closes

3

how is the optic cup formed

optic vesicles start to invaginate and creates double walls

4

how is the lens placed formed

cells of surface ectoderm that are in contact with the optic vesicle elongate

5

where does the lens sit during devleopment

in the mouth of the optic cup

6

intraretinal space

what separates the layers of the optic cup. this quickly disappears and the two layers appose each other and become specific portions of the retina

7

inferior aspect of the optic cup invaginate forming the ______

choroid fissure

8

the choroid fissure allows the ______ to reach the inner chambers of the eye

hyaloid artery

9

during the 7th week the ages of the _______ fuse and the ______ becomes a round opening (future pupil)

choroid tissue fuse and the optic cup mouth becomes a round opening

10

Coloboma

key hole appear of the iris due to the failure of the retinal fissure closing in the 7th week. allows more light into your eye

11

outer layer of optic cup

retinal pigment layer

12

inner layer of optic cup

neural layer

13

3 levels of the neural layer of the retina

pars optica retinae
mantle layer
ganglion cell layer

14

pars optical retinae

posterior 4/5th. comprised of rods and cones

15

mantle layer of retina

generates neurons and glia of outer and inner nuclear layers and ganglion layers

16

the axons of the retina converge from the ____ and _____

optic stalk and optic nerve

17

the anterior 1/5 of the inner layer of the retina

pars ceca retinae

18

pars ceca retinae divides into what 2 parts

1. pars iridica retinae
2. par sciliaris retinae

19

pars indicia retinae

forms inner layer of iris

20

pars ciliaris retinae

helps form ciliary body

21

what forms the sphincter and dilator papillae muscles

the region between the optic cup and overlying surface epithelium that contains mesenchyme

22

how are the long fivers that fills the lumen of the lens formed

cells along the posterior wall elongate anteriorly

23

during the 7th week the _____ fibers reach the _____ of the lens

primary lens fibers reach anterior wall of the lens