Table 1.

Main layers of human skin including their composition and function.

Skin layer	Composition	Function
Epidermis	– Stratified squamous epithelium – Keratinocytes – Melanocytes – Langerhan cells – Merkel cells	– Immune defense – Filter out UV damage – Produce pigmentation – Defense against pathogens – Moderate temperature
Dermis	– Collagen fibrils – Fibroblasts – Phagocytes – Lymphocytes – Langerhan cells – Mast cells	– Pliability – Tensile strength – Elasticity
Hypodermis	– Subcutaneous fat – Insulation	– Calorie reserve – Cushioning and shock absorption