Germ Layers

Question 1

Endoderm

Answer 1

Innermost layer
Forms:
- Digestive system
- Glands
- Part of the respiratory system

Question 2

Mesoderm

Answer 2

Middle layer
Forms:
- Muscles
- Circulatory system
- Excretory system
- Dermis (inner layer of skin)
- Skeleton

Question 3

Ectoderm

Answer 3

Outermost layer
Forms:
 - Brain & nervous system
- Epidermis of skin (hair, sweat glands, and nails)
- Tooth enamel
- Some endocrine glands
- Cornea and lens of eyes

Question 4

Process

Answer 4

Zygote -> Morula -> Gastrula -> Germ Layers