Tissue D

Front

What does hair consist of and where is it not located

Back

Consists of dead keratinized cells

None located on palms, soles, lips, nipples, and portions of external genitalia

Front

Functions of hair include

Back

sensing insects on skin, hair on the head guarding against physical trauma, protecting from heat loss, shielding the skin from sunlight, eyelashes shielding the eyes, and
nose hairs filtering air particles

Front

What are hair pigments made by

Back

melanocytes in hair follicles

Front

What does combinations of different melanin (yellow, rust, brown, black) create

Back

all hair colors

Front

What does red hair have

Back

additional pheomelanin pigment

Front

When does Gray/white hair results

Back

when melanin production decreases and air bubbles replace melanin
in shaft

Front

What is hair

Back

(also called pili) are flexible strands of dead, keratinized cells
that are produced by hair follicles

Front

What does hair contain

Back

hard keratin, not like soft keratin found in skin
Hard keratin is tougher and more durable, and cells do not flake
off

Front

What are the regions of hair

Back

shaft, root

Front

What is the shaft

Back

area that extends above scalp, where keratinization is complete