A&P

Question 1

Functions of the skin (SHAPES?)

Answer 1

Sensation
Heat regulation 
Absorption
Protection 
Excretion 
Secretion

Question 2

Functions of the skin SENSATION

Answer 2

Nerve ending in the skin allow us to experience sensations such as;
Touch
Pain 
Heat
Cold
Pressure

Question 3

Functions of the skin HEAT REG

Answer 3

We swear when we need to cool down, perspiration evaporates and skin cools
Shivering caused hair to stand on end, closed pores and prevents sweat loss, layer of air becomes trapped and warms body
Blood vessels rise when body is hot and cold tract when body is cold to keep heat inside

Question 4

Functions of the skin ABSORPTION

Answer 4

UV light is absorbed though skin, this helps form Vit D - needed for strong, healthy bones
Skin has limited absorption however certain creams are absorbed though the skin

Question 5

Functions of the skin PROTECTION

Answer 5

Protective covering, covers whole body - aided by acid mantle
Provides protection from external factors, acts as cushioning
Outer dead cells help prevent water loss
Skin produces melanin to protect skin against harmful sun rays

Question 6

Functions of the skin EXCRETION

Answer 6

Waste products and toxins are eliminated from the body in sweat, through sweat glands

Question 7

Functions of the skin SECRETION

Answer 7

Sebum is secreted from the sebaceous glands
Sebum keeps skin soft, lubricated and helps keep it waterproof
Sweat combines w sebum to form acid mantle - protective barrier & maintains correct p.H level of the skin (5.5)

Question 8

Epidermis

Answer 8

Outer most layer, made up of 5 separate layers & contains no blood vessels + very few nerves
Pierced by hair follicles and ducts for sweat and sebum

Question 9

Dermis

Answer 9

Dense tissue that is deeper and thicker than the epidermis

Contains fibres, blood vessels, nerves, hair follicular and glands

Question 10

Subcutaneous Layer

Answer 10

Adipose tissue, helps insulate the body (either gaining or loosing heat)
Also severe as padding around organs and helps protect them
Gives rounded appearance of the body