What are 6 functions of the skin?
excretion of small amounts of water and body waste.
maintenance of bones and teeth (synthesis of vit D)
absorbs fat soluble vitamins and drugs through the skin
What are the 3 layers of skin?
Hypodermis (subcutaneous layer)
What is the most outer layer of the skin?
What are the two main layers of the epidermis?
what does the keratin layer do in the epidermis?
tough and fibrous protein
contributes to skin colour and protects heat and foreign material
What does the melanocytes do in the epidermis?
contributes to skin colour and protects against UV rays
What passes through the epidermis?
ducts of sweat glands
what is the epidermis attached to?
attached to dermal layer by upward projections.
What is the deepest layer of the skin?
What does the dermis provide?
Strength and pliability
What are the sensory perceptions of the dermis?
What does the dermis consist of?
What does the dermis contains?
sebaceous glands release sebum
What do the sweat glands do?
helps regulate body temp
What do the sebaceous glands?
release sebum (oily antimicrobial substance) into the hair follicles to provide moisture and some water proofing for the skin
What does the subcutaneous do?
helps insulate the body
absorbs shock to the skeletal system
allows skin to move easily over underlying structures
What does the subcutaneous consist of?
What are the effects of age on the skin?
dermis and epidermis become thinner
efficiency of temp regulation decreases
reduced sebum secreted onto the skin resulting in dry skin
Vit D production decreases resulting in reduced bone strength
melanocytes (producing melanin) become less active resulting in increased likelihood of sunburn