the skin

Question 1

what is the erector muscle ?

Answer 1

the muscle under the skin that makes the hair follicles erect

Question 2

what is vasoconstriction?

Answer 2

when the blood vessels get smaller in daimeter so less blood can go through them so less heat is lost

Question 3

what is vasodialation?

Answer 3

when the blood vessels get thicker in diameter so more blood can go through therefore, loss of heat

Question 4

how does the skin keep itself warm when its cold?

Answer 4

. vasoconstriction - prevents loss of heat
. erector muscle - hairs become erect trap warm air on the surface
. shivering - muscle contraction cause heat to be produced

Question 5

how does the skin keep itslef cool when it’s hot?

Answer 5

. hairs lay flat
. vasodialation - loss of heat
. sweat produces from sweat gland evaportaion means surface of skin loses heat