The subcutaneous layer

This is a thick layer of connective tissue found below the dermis. The type of tissue found in this layer (fatty tissue) helps support delicate structures such as blood vessels and nerve endings. It also cushions the dermis from underlying tissues such as muscles and bones.

The subcutaneous layer contains the same collagen and elastin fibres as the dermis and contains the major arteries and veins which supply the skin and form a network throughout the dermis. The fat cells contained within this layer help to insulate the body by reducing heat loss.

Below the subcutaneous layer lies the subdermal muscle layer.

Medulla

Cortex

Cuticle

Medulla

Cortex

Cuticle

Fig 2.3 Structure of the hair

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