HAIR Flashcards
1
Q
Where does hair cover?
A
Cover all body surfaces, except volar skin (hands and feet)
2
Q
What does hair on our head provide us?
A
UV protection and thermal insulation
3
Q
What does hair on our eye and nose provide us?
A
Particle filtration
4
Q
What does hair on our body provide us?
A
Touch sensation (nerve endings) for most of body
5
Q
What are the three types of hair?
A
- Vellus hairs
- Intermediate hairs
- Terminal hairs
6
Q
What are vellus hairs?
A
Fine (“peach fuzz”) hair found over most of the body
7
Q
What are intermediate hairs (2)?
A
- Hairs of the limbs
- Change in distribution in response to sex hormones (density changes)
8
Q
What are terminal hairs (2)?
A
- Heavier and more pigmented
- Scalp, eyebrow, eyelash hairs
9
Q
What is the hair growth cycle on scalp hair? (2)
A
- Grows for about 2 to 6 years
- Rests for about 3 months (club hair); new hair pushes out old one
10
Q
True or False: 85% of hairs are in the growth phase at any given time
A
True
