Skim embryology Flashcards
1
Q
Describe the formation of the epidermis
A
Ectoderm cells form a single layered periderm, which gradually increases in cell number
The periderm cells then cast off to form the epidermis
2
Q
What trigeminal layer forms the dermis of the skin?
A
mesoderm
3
Q
Where are melanocytes formed in development?
A
Neural crest
4
Q
What are the 3 main skin layers at 4 weeks of development?
A
Periderm
Basal layer
Dermis (Corium)
5
Q
What are the 4 layers that form from the periderm at 16 weeks of development?
A
Keratin layer
Granular layer
Prickle cell layer
Basal layer
6
Q
What skin structures begin to form at 26 weeks development?
A
Appendages such as hairs and sebaceous glands
7
Q
What are Blaschko’s lines?
A
Developmental growth lines of the skin
8
Q
Describe the formation of hairs in development
A
9
Q
A
