New Hair & Skin Structure

Strywthyr Gwallt & CroenHair & Skin Structure

• A single hair is called a hair shaft.
• It is made up of:

• the cuticle
• the cortex
• the medulla.

• Epidermis:

outer layer of the skin - its thin & acts as protection

• Dermis:

lies beneath the epidermis - is the thickest layer of the skin - the fibres & elastic tissue gives strength & flexibility

• Subcutaneous layer: Fatty layer -

provides insulation for your body also a cushion and protection for your vital organs

• Blood Capillary Vessel: Network loop

Carries nutrients & oxygen and is found in the dermis

• Nerve Fibre: Sends pulses or messages to the nerve ends

• Nerve Endings: Responds to pain, pressure, heat & touch

• Sweat Gland:

Releases water & waste on to the epidermis : helps to cool the body

• Hair Root: Growing area of the hair

• Hair Follicle :

found in the demis & its the pocket in which the hair grows

• Hair Shaft:

is found above the skin or on the scalp

• Sebaceous Gland: opens into the hair follicle to secrete a natural oily or waxy matter called SEBUM - this lubricates the hair & skin

• Arrector Pili Muscle:

attached to the hair follicle, it contracts when cold or frightened makes hair stand up - goosebumps

• Hair Bulb: is created by the blood nourishing cells to form keratin

• Dermal Papilla:

nourishes the base of the hair follicle sends signals of hair growth to the uppermost layer of thr dermis