Anatomy Flashcards
1
Q
tough, outer protective covering of the hair shaft
A
Cuticle
2
Q
Divided into three layers called the cuticle, cortex and medulla
A
Hair Shaft
3
Q
the soft, elastic, thick inner layer made up of elongated cells that bond together tightly (containing melanin and keratin)
A
Cortex
4
Q
The deepest layer, consisting of round cells
A
Medulla
5
Q
What is Melanin ?
A
the coloring matter that provides natural color to our hair, skin and eyes. (Located in the cortex layer of the hair)
6
Q
Produces brown to black pigments in the hair
A
Eumelanin
7
Q
What pigments do Pheomelanin produce?
A
yellow to red pigments in the hair
8
Q
What the medical term for grey hair?
A
Canities
9
Q
What is Acquired Canities?
A
when the melanocytes gradually become inactive (congenital canities can occur before or birth ex. Albinism)
