Trace Evidence

Question 1

Hair

Answer 1

Slender, thread-like growth originating from the skin in mammals

Question 2

Follicle

Answer 2

Structure from which the hair grows

Question 3

Keratin

Answer 3

Protein based material from which hairs are made; strengthens hairs due to S-S bonds

Question 4

Keratinization

Answer 4

The hardening process of hair growth

Question 5

Three phases of hair growth

Answer 5

Anagen, catagen, telogen

Question 6

Anagen

Answer 6

Actively growing phase, follicle produces new cells and pushes them up the hair shaft, 80-90% of hairs

Question 7

Melanin

Answer 7

Pigment, small granules that give hair their color

Question 8

Melanocytes

Answer 8

Cells that produce melanin

Question 9

Catagen

Answer 9

Transitional phase of hair growth where the follicle begins to shut down the production of cells and the root condenses, 2% of hairs

Question 10

Telogen

Answer 10

Resting phase of the hair follicle, 10-18% of hairs

Question 11

Three main structural elements in a hair

Answer 11

Cuticle, cortex, medulla