Please enable JavaScript.
Coggle requires JavaScript to display documents.
12.2 Removing Waste Products - Coggle Diagram
12.2 Removing Waste Products
Everything you do affects your internal conditions
Removing Waste Products
Your body is constantly reducing waste products
The more extreme conditions you put your body in, the more waste products you produce
Two main examples of waste products
Carbon Dioxide
Produced by body cells during respiration
Must be removed because when it dissolved it creates an acidic solution
Carbon dioxide is a waste product of respiration
CO₂ diffuses from cells → blood down a concentration gradient
CO₂ diffuses from blood via alveoli in the lungs
CO₂ is removed from the body when you exhale
Some water is also lost as water vapour when you exhale
Urea
The nitrogenous waste produces by the the excess amino acids in your liver
Urea passes from the livers cells into the blood
A build up in urea can cause extensive damage to the body
Filtered out by the kidney
Excreted via urine along with excess water and salt
Average person produces 900 litres of urine a year
Produces when you have excess protein
Deamonation
Excess amino acids cannot be stored
Liver removes the amino group from excess amino acids
This process is called deamination
Produces very toxic ammonia
Ammonia is quickly converted into urea
Maintaining water and mineral ion balance in the body
If your body loses or gains too much water, the cells cannot function properly
Water, mineral ions and urea are lost from the body
Control
Urea, excess water, and excess mineral ions are removed from the body via the kidneys, then excreted in the urine. This process is very tightly regulated to:
Maintain the water and mineral ion content of the blood within narrow limits, and
Remove urea (the poisonous nitrogenous waste).
No control
Water leaves the lungs every time you exhale
Lost via sweat