Skin

Click here for GCSE coursework!

GCSE subject: English | Maths | Biology | Chemistry | Physics | Geography | History | Food tech | French | IT | Music | RS
Click to chat in GCSE forums | Click for 1000s of GCSE courseworks online!

GCSE Biology> Human Biology> Skin
The skin is a barrier to the outside world against bacteria etc.
The skin is also very sensitive to we can feel things
The skin's main function is temperature control. Below is how the skin is able to change the bodies temperature
Cooling the body:
Blood capillaries widen (vasodilatation) to bring more blood near the surface of the skin so heat can be lost into the surroundings by radiation and convection
Sweat is produced which, as it evaporates, has a cooling effect on the body
Hairs lie flat which allows warm air to escape faster
Warming the body:
Blood capillaries in the skin become more narrow (vasoconstriction) so less heat is lost into the surroundings
Sweating decreases so less heat is lost
Hairs on body stand up on end to trap air which reduces warm air escaping so rapidly
Click here for coursework essays on Skin
side bar Click here for GCSE forums!

Click here for GCSE coursework!
GCSE subject: English \| Maths \| Biology \| Chemistry \| Physics \| Geography \| History \| Food tech \| French \| IT \| Music \| RS Click to chat in GCSE forums \| Click for 1000s of GCSE courseworks online!