Identify the parts that are labelled and describe the role of each part in the process of excretion. How does the filtration process by nephron differs from filtration process by a dialysis unit?
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Answer:
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A) Collecting duct
B) 1st convoluted tubule
C) 2nd convoluted tubule
x) branch of renal artery
y) branch of renal vein
Process by nephron
Filtration is the mass movement of water and solutes from plasma to the renal tubule that occurs in the renal corpuscle. About 20% of the plasma volume passing through the glomerulus at any given time is filtered. This means that about 180 l of fluid are filtered by the kidneys every day.
Process by dialysis unit
One needle will slowly remove blood and transfer it to a machine called a dialyser or dialysis machine. The dialysis machine is made up of a series of membranes that act as filters and a special liquid called dialysate. The membranes filter waste products from your blood, which are passed into the dialysate fluid.