EMBRYOLOGY

Question 1

Trophoblast

Answer 1

Cytotrophoblast and Syncytiotrophoblast which extends into the Uterine Wall as the embryo undergoes implantation

Question 2

Hypoblast

Answer 2

1. Develops on the surface of Inner Cell Mass facing Blastocyst Cavity
2. Becomes the PRIMARY ENDODERM

Question 3

Epiblast

Answer 3

Primary Ectoderm; Facing Amniotic Cavity

Question 4

Hypoblast

Development of the Amniotic Cavity and Bilaminar Embryonic Disc

Answer 4

Primary Endoderm; Facing Primitive Yolk Sac

Question 5

Endoderm

Answer 5

Epithelium of GI and Respiratory Tract, some glands

Question 6

Mesoderm

Answer 6

Muscles, CT, Blood, Vessels, Skeleton, Reproductive, Excretory

Question 7

Ectoderm

Answer 7

Nervous System, Epidermis, Hair, Nails, Tooth Enamel

Question 8

Gastrulation

Answer 8

Bilaminar Disc becomes Trilaminar

Question 9

Primitive Streak

Answer 9

Develops in the median place on the Epiblast surface

Question 10

Primitive Node

Answer 10

Cranial thickening of the Primitive Streak

Question 11

Primitive Groove

Answer 11

Forms IN the Primitive Streak; Epiblasts invaginate Ventrally

Question 12

Differentiation of Early Embryo

Answer 12

1. Zygote
2. 2 Cells
3. Morula
4. Blastocyst w/ Blastocyst Cavity
5. Cytotrophoblast and Inner Cell Mass