During exercise
your core body
temperature
increases.
This is because your muscles and heart
etc are working harder and faster to keep
up with what you're doing
During exercise your skin doesnt go red
because you are sweating. The sweat
evaporates and cools down the skin
Sweating also lets the heat come out with the sweat and the sweat then gets
evaporated meaning the heat is lost in the air other than in the body.
When you get too hot , the blood vessels
supplying your capillaries just below your
skin expand. More blood flows closer to the
surface which then allows the heat to
radiate out quicker
Your sweat glands and kidneys control your water
output.Kidneys remove any excess water in your urine