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The integumentary system is composed of:
1. The skin
2. Hair
3. Nails
4. Associated exocrine glands
Layers of the Epidermis from superficial to deep:
1. Stratum corneum
2. Stratum granulosum
3. Stratum spinosum
4. Stratum basale
Skin layer that is eight to ten cell layers thick and has Keratinocytes shaped like footballs
Stratum Spinosum
Layer of skin composed of mostly connective tissue that also contains:
1. Blood vessels
2. Hair follicles
3. Glands
• Supports the epidermis with nutrients, strength, and elasticity
Dermis
The layers of the skin are:
1. Epidermis
2. Dermis
3. Hypodermis
*Fascia connects skin to underlying muscle*
Layer of Epidermis not found in thin skin
Stratum lucidum
Cells that provide immune protection
Langerhans (dendritic)
Epidermis
Deepest of the epidermal layers
Stratum Basale
Named for its granular appearance, melanin can travel to cells within this layer
Stratum Granulosum
Type of skin found on palms and soles of feet
Thick skin (five layers)
Sensory receptors used for discriminatory touch
Merkel cells
Protein that functions as a water barrier
Eleidin
Type of skin found in all locations of the body
Thin skin (four layers)
Produce melanin to protect cells from UV radiation
Melanocytes
Most superficial layer of the epidermis
Stratum Corneum