Basic Embryology

Question 1

Embryonic” period:

Answer 1

First 8 weeks

All major organs formed

Question 2

“Fetal” period:

Answer 2

Remaining 30 weeks

Organs grow larger and become more complex

Question 3

Three primary “germ” layers:

Answer 3

body tissues develop from these:
Ectoderm
Endoderm
Mesoderm

Question 4

Endoderm

Answer 4

Epithelial lining of glands of digestive and respiratory tracts

Question 5

Ectoderm

Answer 5

Epidermis, hair, nails, glands of skin, brain and spinal cord, neural crest