Anat/phys/biochem Lab 6 Embryology

Front 1

what are the first five steps of embryologicial development?
1.
2. name and describe
3. name an describe
4.name and when implanted
5.

Back 1

1. Fertilization
2. Morula (solid mass)
3. Blastula (hollow)
4. Inner cell mass (implanted on ~day 10)
5. Embryonic plate

Front 2

what are the three layers of the embryonic plate

Back 2

1. Ectoderm
2. mesoderm
3. endoderm

Front 3

describe the three layers of the embryonic plate
1. ectoderm
2. mesoderm
3. endoderm

Back 3

1. skin, nervous system, RPE and neural retina, lens, dilator, sphincter*
2. CT, muscle
3. nothing eye

Front 4

what layer of the embryonic plate forms the lens?

Back 4

surface ectoderm

Front 5

what layer of the embryonic plate forms the posterior epithelium of the iris?

Back 5

neuro ectoderm

Front 6

what layer of the embryonic plate forms the skin

Back 6

surface ectoderm

Front 7

what layer of the embryonic plate forms the inner nonpigmented epithelium of the lens

Back 7

neuro ectoderm

Front 8

what layer of the embryonic plate forms the corneal epithelium

Back 8

surface ectoderm

Front 9

what layer of the embryonic plate forms the RPE

Back 9

neuro ectoderm

Front 10

what layer of the embryonic plate forms the outer pigmented epithelium

Back 10

neuroectoderm

Front 11

what layer of the neuro ectoderm forms the anterio epithelium of the iris

Back 11

neuro ectoderm

Front 12

what is the mesenchyme made of

Back 12

connective tissue

Front 13

what two things does the mesenchyme make up?

Back 13

1. neural crest cells
2. mesoderm

Front 14

what gene makes the lens vesicle

Back 14

Pac 6 gene

Front 15

what day does the lens vesicle separate from the surface ectoderm

Back 15

day 33

Front 16

what is the thickening of the surface ectoderm called

Back 16

lens placode

Front 17

what forms the primary lens fibers

Back 17

posterior lens epithelium

Front 18

what day does mitosis at the pre-equitorial zone form the secondary lens fibers of the fetal nucleus

Back 18

day 49

Front 19

what is the tissue called that forms the neural tube

Back 19

neural ectoderm

Front 20

what is the tissue called that is the layer that covers surface of embryo

Back 20

surface ectoderm

Front 21

what is the layer called that separates from crest areas (island b/t surface and neural ectoderm)

Back 21

neural crest cells

Front 22

what is the germ layer located b/t and all around neural tube, b/t neural crest and surface ectoderm

Back 22

mesoderm

Front 23

what is the germ layer called that includes both neural crest and mesoderm

Back 23

meseenchyme

Front 24

out-pouches from diencephalon form outpouching of 2 eyes from both sides of head (day 25)

Back 24

optic pits --> optic vesicles

Front 25

what is this called that is the inferior region of the vesicle and stalk begins to invaginate and forms a cleft or optic fissure

Back 25

optic cup

Front 26

what is the hyaloid arterial system made of and what makes the vessels formed by branches from the posterior tunica vasculosa lentis?

Back 26

mesenchyme
hyloid vessels

Front 27

what branches does the hyaloid arterial system of the anterior tunica vasculosa lentis form

Back 27

branches of the annular vessel *

Front 28

what is the function of the hyloid arterial system (mesenchyme)
-what time frame

Back 28

feed the lens
3-4 months

Front 29

when is the hyaloid arterial system (mesenchyme) absorbed

Back 29

by 8th month

Front 30

what determines the depth of the optic cup

Back 30

* the amount of reabsorption of the glial tissue that surrounds the hyaloid arterial system

Front 31

what is the remnant of glial tissue of the hyloid system called that is left at the optic cup

Back 31

Bergmeister's papilla

Front 32

what is the remnant the hyloid tissue called left by a small area of tissue on the posterior lens called

Back 32

Mittendorf's dot

Front 33

what is the first layer to differentiate in the retina

Back 33

RPE

Front 34

what occurs during week 4-5 during retinal embryonic development
-what do the layers contain

Back 34

proliferation
contains cell bodies

Front 35

what is the empty space in the developing embryonic optic cup called

Back 35

intraretinal space

Front 36

the outer neuroblastic layer has what 3 structures in it

Back 36

photoreceptors
horizontal, bipolar cells

Front 37

the inner neuroblastic layer has what three cell structures in it

Back 37

amacrine, muller and ganglion cells

Front 38

the outer layer of the optic cup has includes what 3 structures

Back 38

retina, ciliary bodies, and iris

Front 39

the inner layer of the optic cup is made of what

Back 39

the whole thing is the inner layer of optic cup (neuroectoderm)

Front 40

in the neuroectoderm, what 3 layers line the outer surface

Back 40

RPE --> outer pigmented eptithelium of ciliary bodies --> anterior epithelium of iris