Hair types, structure & growth cycle Flashcards Preview

Beauty Therapy Level 2 - Waxing > Hair types, structure & growth cycle > Flashcards

Flashcards in Hair types, structure & growth cycle Deck (16)
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1
Q

Hair type - lanugo

A

Hair found on a fetus at 3-5 months gestation. Replaced by vellus / terminal hair by 7 months gestation.

2
Q

Hair type - vellus

A

Fine, downy unpigmented hair found all over the body except for the lips, palms and soles of the feet. Has no medulla & follicles are shallow.

3
Q

Hair type - terminal

A

Coarse pigmented hair which varies in length dependent on location. Includes scalp hair, lashes & brows, underarm and bikini hair. Hairs vary in shape, diameter, length & colour. Follicles are deeply set in the dermis.

4
Q

Hair structure - hair shaft

A

The portion of hair which extends beyond the skins surface.

5
Q

Hair structure - the root

A

The part of the hair that is in the follicle.

6
Q

Hair structure - the bulb

A

The enlarged base of the root – known as the bulb as the lower part of the follicle is wider than the upper part.

7
Q

Hair structure - the arrector pili muscle

A

A small muscle which attaches to the base of the hair follicle and the epidermis. On contraction, the hair stands on end creating a ‘goose bump’.

8
Q

Hair structure - the sebaceous gland

A

A gland which is attached to the upper thirds of the hair follicle and secretes sebum (the skin’s natural moisturiser) onto the skin.

9
Q

Hair structure - the dermal papilla

A

A connective tissue sheath which is surrounded by the hair bulb. It has a good blood supply and supplies the hair with nutrients from the blood.

10
Q

Hair structure - the matrix

A

Located within the lower part of the hair bulb. Contains actively dividing cells. New cells push older ones forwards resulting in hair growth.

11
Q

Mitosis

A

The method of cell division for all cells in the body other than sex cells (ova & sperm). One cell divides producing 2 identical copies.

12
Q

Keratin

A

The protein which makes up hair, nails and skin.

13
Q

Keratinisation

A

The process by which epithelial cells become filled with keratin granules, die and form tough, resistant structures such as hair / nail / skin.

14
Q

Hair growth cycle - anagen stage

A

The active growing phase. The hair is fully attached to the blood supply at the base of the follicle and cells in the matrix are actively dividing.

15
Q

Hair growth cycle - catagen stage

A

The changing or transitional stage where the follicle moves from growth to rest. The hair separated from the dermal papilla and moves up the follicle.

16
Q

Hair growth cycle - telogen stage

A

The resting stage. The shortened follicle rests until it is stimulated to grow again & the catagen hair falls away.