How do kidneys remove waste from blood to produce urine?
1 Answer
Kidneys filter blood and in the process remove waste and excess substances to produce urine.
Explanation:
The functional unit of kidneys is the nephron.
Nephron is a long fine tubule which is folded into a cup like structure called Bowman's capsule. This capsule encloses a ball like cluster of fine capillaries called the glomerulus.
Blood enters from one end and leaves from the other , passing through tiny arterioles in the glomerulus . During this process fluid containing wastes , filters out of the blood into the glomerulus and flows into the tubule of the nephron.
The composition of this filtrate is altered in the tubule. Certain substances are added to it and selective re absorption of water and other constituents also occurs.
The collecting tubules then transport the urine thus formed into the ureter.
