Skin Part 1- 2 Flashcards
HAIR FOLLICLE:
What is from germinal cells and contains the cuticle?
Inner root sheath
HAIR FOLLICLE:
What 2 sheaths do hair follicles contain?
Inner and outer sheath
What abuts follicular basement membrane?
Connective tissue sheath
What type of animals have simple hair follicles?
Ruminants, horses, pigs
What direction are hair follicles in sheep?
Vertical
What type of animals have compound hair follicles?
Carnivores
Where is the union of compound hair follicles in carnivores?
At sebaceous gland opening
What is an example of a tactile hair?
Sinus hairs (whiskers)
What hairs are: blood-filled sinuses in connective tissue sheaths?
Tactile hairs
Is avian epidermis thinner or thicker than mammals?
Thinner
What epidermis layer in avians contain the following:
Basal layer
Intermediate layers
Vacuolated layer
Stratum germinativum
What 2 stratum make up avian epidermis?
Germinativum
Corneum
Do avains have glands in their epidermis?
NO
Do avians have papillae?
NO
What are the 3 main types of feathers?
Contour
Down
Filoplume