Animal excretion

• homeostasis: maintenance of a constant internal environment in an organism
• excretion: removal of waste products of metabolism from the body
• organs of excretion:

  • lungs
  • skin
  • kidney
• the main waste products are water, carbon dioxide and wastes
• the liver is involved in excretion as excess amino acids are split into carbohydrates and urea. these are set to the kidneys to be excreted.