The skin and its appendages, including hair follicles, sebaceous glands and sweat glands provide our body with overall protection. Two main layers form the skin: the outer epidermis and the dermis below. The dermis is a connective tissue important for skin firmness and elasticity.
It contains relatively few fibroblast cells embedded in a matrix of collagen and elastin proteins. The epidermis is a stratified epithelium composed of different layers of densely arranged keratinocyte cells (figure 1).
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