Biology·Organisation & maintenance · NSSCO 3.11
Excretion in humans
Narrated lesson · press play
How your body removes its own poisonous waste — the liver making urea from excess protein, the kidneys cleaning your blood, and what happens when they fail.
What you'll learn in this lesson
By the end you should be able to (NSSCO Biology 3.11):
- Define deamination and describe the formation of urea in the liver
- Describe the liver's breakdown of alcohol, drugs and hormones
- Describe the kidney's functions (removing urea and excess water; reabsorbing glucose and salts)
- Identify the ureter, bladder and urethra; outline dialysis and kidney transplants
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Quick revision
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Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.
Hands-on lab
Model kidney filtering with Visking tubing in 3D