anatomy and physiology of the skin chapter 3

functions of integumentary system (4)

two protective barrier, temp regulation, houses sensory receptors, secretes important fluids

organs of the integumentary system(5)

skin, hair, nails, sebaceous glands, sweat glands

potection

forms two way barrier

sensory receptors

temp, pain, touch, and pressure

sweat glands(sudoriferous glands)

creates cooling effect when sweat evaporates. helps in maintaining temp. sweat travels to surface in sweat duct

sebaceous glands

oil glands, secrete sebum

epidermis

composed of epithelial tissue has no blood or connective tissue.

basal layer of epidermis houses

keratin and melanocytes

dermis(corium)

dermis

conenctive tissue and collagen fibers

dermis houses

hair follicles, sweat glands, sebeceous glands,blood vessels, lymph vessels, sensory receptors, nerve fibers, and muscle fibers

subcutaneous(hypodermis)

deepest layer composed of lipoctyes

nail body

flat plate of keratin

nail bed

connects nail body to underlying tissue

lunula

half moon white area at base of nail

cuticle

soft tissue that covers nail root