53477
CONTROL
SYSTEMS
- The Urinary
System
- Cells produce waste products
which diffuces into the blood.
+carbon dioxide from respiration
+urea from breakdown of amino
acid in liver
- The urinary system produces, stores and
removes urine from the body. Kidneys
remove ecess water and urea.
- Cells produce waste products
which diffuces into the blood.
+carbon dioxide from respiration
+urea from breakdown of amino
acid in liver
- Kidney Failure
- Medical condition when the kidneys
can no longer filter waste products
- SYMPTOMS: Vomiting, Diarrhoea, Nausea and
urine problems (more concentrated + infrequent OR
less concentrated + frequent)
- CAUSED BY: Restriction of blood flow to kidneys
OR massive does of toxins. Aloso by diabetes.
- TREATMENTS: Kidney transplant OR
Kidney dialysis (filtering of blood by
machine)
- Medical condition when the kidneys
can no longer filter waste products
- The Kidney
- Three stages in the
working of the kidney
- 1) FILTRATION: Water + small molecules
squeezed out of blood under pressure.
- 2) SELECTIVE REABSORPTION: Useful substances
reabsorbed into blood + water level in blood adjusted
to remain constant (OSMOREGULATION)
- 3) EXCRETION OF WASTE: Excess water,
ions and all urea passes to bladder in form of
urine and fineally removed from body.
- 1) FILTRATION: Water + small molecules
squeezed out of blood under pressure.
- Three stages in the
working of the kidney
- Nephron
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