Embryogenesis

Question 1

What are the four steps of embryogenesis?

Answer 1

fertilization 
cleavage 
blastulation 
Gastrulation 
neurulation

Question 2

What is fertilization?

Answer 2

penetration of sperm with ovum to become a 2N zygote

Question 3

What is cleavage?

Answer 3

the repeated mitotic subdivision of the zygote in to a morula (16 blastomeres). the cytoplasmic mass does not grow so each blastomere is smaller

Question 4

What is blastulation?

Answer 4

the morula develops into a blastocyst _ a fluid filled cavity that implants itself into the uterine lining

Question 5

What is Gastrulation?

Answer 5

formation of the primary three germ layers the embryo is called a gastrula
Ectoderm
Endoderm
Mesoderm

Question 6

What is neurulation?

Answer 6

when the neural plate and neural folds close to create the neural tube

Question 7

What does the Ectoderm develop into?

Answer 7

epidermis and nervous system

Question 8

What does the mesoderm develop into?

Answer 8

bone, connective tissue, muscle, blood

circulatory, reproductive, and excretory organs

Question 9

what will the endoderm develop into?

Answer 9

epithelial linings of the respiratory and digestive death

glands of accessory organs