This is an activity of the biology book that we had to make for our biology class
1) a) Define the terms excretion and egestion
- Excretionas removal from organisms of the waste products of metabolism (chemical reactions in cells including respiration), toxic materials, and substances in excess of requirements.
- Egestionas the passing out of food that has not been digested or absorbed, as faeces, through the anus
1) b) The kidney is an excretory organ. It produces urine that contains urea. State where in the body urea is formed and what is formed from.
Urea is formed in the liver from excess amino acids.