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The Structure of the Skin

Skin - multilayered organ that covers and protects the body

Functions of the Integumentary System

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▪ Temperature regulation – cooling and heating Vitamin production – vitamin D
st
▪ Protection and senses – 1 defense against bacteria, etc. Senses of touch, temperature
Structure Function

• the thinner outer layer of • makes new skin cells
the skin • prevents water loss
Epidermis • doesn’t contain blood • responsible for skin color
vessels
• protects from the Sun’s UV rays
• forms a barrier to protect from invading
• composed of epithelial
tissue and some nervous pathogens
tissue
• the thicker second layer of • responsible for the structural strength and
flexibility of the skin
the skin • produces sweat and oil
• contains blood vessels
Dermis • composed of connective, • involved in sensation
muscle, and nervous
tissues • helps regulate body temperature

• located below the dermis • stores fat
Subcutan eous Layer • composed of connective • helps the body retain heat
• protects internal structures from impact
tissue

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