Question

Draw and label the structure of the hair

Answer 1

Explanation:

The hair shaft is comprised of three layers: the cuticle, cortex, and medulla. The cuticle is the hair's outer most layer which has shingle or scale like cells that overlap. These cells work defensively to prevent damage to the hair's inner structure and to control water content of hair fiber..

Hair Follicle. Tube-like depression or pocket in skin/scalp that contains the hair root.

Hair Bulb. Lowest part of a hair strand; thickened, club-shaped structure that forms the lower part of the hair root.

Dermal Papilla. ...

Arrestor Pili Muscle. ...

Sebaceous Glands.

Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft

Answer 2

• Hair is a simple structure with many important functions in social functioning.

• It is made of a tough protein called keratin.

• Each hair is anchored into the skin by the hair follicle.

• The hair bulb forms the base of the hair follicle in which living cells divide and grow to build the hair shaft.

• Also, the blood vessels nourish the cells in the hair bulb and deliver hormones that modify hair growth and structure at different times of life.

• It is important to note, Hair growth  occurs in cycles consisting of three phases:

1. The growth phase or Anagen: Here, Most hair is growing at any given time and each hair spends several years in this phase.
2. The transitional phase or Catagen: After a few weeks, hair growth slows and the hair follicle shrinks.
3. The resting phase or Telogen: Over a few months, hair growth stops and the old hair detaches from the hair follicle and the new hair begins the growth phase, pushing the old hair out.

#SPJ1