Skin
Skin-Structure and function
Skin is the outermost covering of the body and covers the entire body.
It has a surface area of 1.5-2 meters and accounts for 12-15% of the total body weight.
The skin along its derivatives constitutes the integumentary system.
Structure of the Skin
Skin is made up of two main components:
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Skin proper
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Skin derivatives
Skin Proper
The skin proper is composed of two layers:
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Epidermis
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Dermis
Epidermis
The epidermis is the outer layer of the skin, which is formed by stratified squamous epithelium layers, which are arranged in horizontal layers. It is considered to be a lifeless tissue as it lacks any blood vessels.
The epidermis contains keratin, which makes it tough. The epidermis is made up of three sub-layers, which are:
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Outermost cornified layer (stratum corneum) - This layer is made up of dead cells containing keratin. This laye…
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