Integumentary system

Integumentary sys main functions

protection, temp regulation, prevent water loss, sensing, vitamin D production

layers of skin

epidermis, dermis, subcutaneous layer

epidermis

outer layer, made of epithelial cells, provides protection

layers of epidermis

stratum corneuem, stratum lucidum, stratum granulosum, stratum spinosum, stratum basale

dermis

middle layer, elasticity, nourishes epidermis

dermis contains:

blood vessels, hair follicles, sweat glands, nerves, collagen fibers

Subcutaneous layer (hypodermis)

deepest layer, mostly adipose tissue

subcutaneous functions

insulation, energy storage, shock absorption

accessory structures of skin

hair, nails, sweat glands, sebaceous glands

hair

protects scalp, helps with temp regulation

sweat glands

produce sweat, cools the body

sebaceous glands

produce oil (sebum), keeps skin and hair moisturized