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