Hi Y10,

I would like you to start looking at the objectives below, and to find out what homeostasis is. Find a definition of it!

Flowering plants
Students will be assessed on their ability to:
2.56 understand the origin of carbon dioxide and oxygen as waste products of
metabolism and their loss from the stomata of a leaf
Humans
2.57 understand that the lungs, kidneys and skin are organs of excretion
2.58 understand how the kidney carries out its roles of excretion and of
osmoregulation
2.59 describe the structure of the urinary system, including the kidneys, ureters,
bladder and urethra

http://internationalgcsebiology.wikispaces.com/Excretion

http://askmichellebiology.blogspot.com.es/2012/08/excretion-humans.html

Miss Maddy