4. Embryology

Question 1

Where does fertilization occur?

Answer 1

Fallopian tube/Uterine tube

Question 2

Zygote

Answer 2

Fertilized egg

Question 3

Cleavage

Answer 3

division of zygote until the 16 cell stage

Question 4

morula

Answer 4

16 cell stage

Question 5

The morula hollows out and becomes the _______

Answer 5

Blastocyst

Question 6

The blastocyst consists of two parts:

Answer 6

1. Inner Cell Mass
2. trophoblast

Question 7

Inner cell mass becomes the ______A______

The trophoblast becomes the ______B______

Answer 7

A. embryo

B. fetal half of placenta

Question 8

Inner Cell Mass divides into two sheets of cells to form bilaminar germinal disc. The two layers are

Answer 8

Epiblast and hypoblast

Question 9

Primitive streak

Answer 9

Opening that forms in epiblast to space between epiblast and hypoblast.

Question 10

gastrulation

Answer 10

epiblast cells move through primitive streak towards hypoblast, forming the three germ layers

Question 11

Ectoderm derivatives

Answer 11

skin and nervous tissue

Question 12

Mesoderm derivatives

Answer 12

muscles, heart, kidney, reproductive organs

Question 13

endoderm derivatives

Answer 13

digestive and respiratory systems