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Integumentary SystemMade of several organs including•Skin•Hair•Nails•Sweat glands•Oil glands
The Integumentary System Protects
The Integumentary System Regulates Body Temperature
The Integumentary System Synthesizes and Stores
Vitamin DLipids
The Integumentary System Allows Sensations
• Touch
• Pressure
• Temperature
• Pain
The Integumentary System Excretes and Secretes
Secretes:• Precursor to Vitamin D• Melanin
Excretes:• Water• Urea• Salts• Milk
Structure of the Skin
Epidermis
Epidermis
Keratinocytes and Melanocytes
Thin vs Thick Skin
Thin vs Thick Skin
Stratum Corneum
Dandruff
Corns and Calluses
Dermis of Skin
Dermis of Skin
Fingerprints
Reticular Layer of Dermis
Wrinkles
Lines of Cleavage(Tension Lines)
Structures in the Dermis
Blood vessels
Meissner’s Corpuscles
(Looks like cotton candy)
Structures in the Dermis
Pacinian Corpuscles
Structures in the Dermis
Structures in the Dermis
• Exocrine glands• Muscles (Arrector pili)• Hair• Nails
Skin Color
Cyanosis
Accessory Structures of the Skin: Hair
Hair Shaft and Hair Root
Hair Shaft and Hair Root Have 3 Layers
•Medulla•Cortex•Cuticle
Hair Follicle and Hair Bulb
Hair Follicle and Hair Bulb
Functions of Hair
• Senses
• Guards
• Shields
• Protects
Hair Color
Sebaceous Glands
Sebaceous Gland
Sudoriferous (Sweat) Glands
Sudoriferous (Sweat) Glands
Eccrine Sweat Glands
Apocrine Sweat Glands
Pubic Hair
Axillary Hair
Apocrine Sweat Glands
(wide lumen)
Eccrine Sweat Glands
(narrow lumen)
Ceruminous Glands
Nails
Toe Nail
Nail Root and Nail Matrix