Hair structure

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• Anatomy and physiology
• Further Education (Key Stage 5)

_{To introduce the structure of the hair and the hair growth cycle}

Identify the 3 layers of the hair.

State the 3 stages of the hair growth cycle.

Explain the changes which occur during the different phases of the hair growth cycle.

State the different types of hair found on the body and give examples.

KEY WORDS

VELLUS, TERMINAL, ANAGEN, CATAGEN, TELOGEN, CUTICLE, CORTEX, MEDULLA

 

Recall the Three zones of the skin structure.

Describe the Epidermis

What happens to arrector pili muscles?

A

Lift hair

B

Contract when cold

C

Relax when warm

D

Produce sweat

How long does the Anagen stage last for?

A

2-7Years

B

1-6 years

C

3-6Years

D

4-6 years

List the three stages of the hair growth cycle

Sleepvraag

Hair shaft

Epidermis

Follicle

Dermis

Sebaceous gland

Dermal papilla

Blood capillaries

Arrector Pilli muscle

Sweat gland

There are two types of hair found all over our body

Vellus hair

Terminal hair

Vellus hair

Fine, downy hair which covers the body. 

It has no colour pigment.

Terminal hair

• Darker and thicker hair

• Has a colour pigment

• This is the hair found on the head.

Hair covers our whole body

1

True

2

False

False

Hair covers most of our body except, the palms of our hands and soles of our feet.