Notes
"Role of kidney in process of excretion and osmoregulation"
Excretion of Urea (contains nitrogen - toxic to body and cannot be stored)
-> Original form of nitrogen (circulatory system) = amino acids
-> EXCESS amino acids MUST be removed as TOXIC
-> Removal = role of liver & kidneys
PROCESS OF EXCRETION (of Urea)
1. Blood circulates to liver ---> amino acids broken down and converted --> Urea molecule
2. Urea circulates in blood stream -> Kidneys (both) --> Kidneys filter urea from blood
3. Urea + Water = Urine ----> Bladder (therefore removed from blood circulatory system
4. Filtered blood (from kidneys) returns to circulatory system
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