Define Excretion in human beings. Draw structure of nephron qnd explain it.
Answers
Excretion is a biological process by which an organism get rid of excess or toxic waste products of metabolism.Excretion removes unwanted by-products of metabolism,toxic chemical substances,regulate the ionic concentration of body fluids,regulates water content of body,regulate pH of bodyfluids.
Excretion is the process of removal of toxic wastes from the body of an organism. The major wastes produced by us are: Carbon dioxide and Urea. Carbon dioxide is produced by the process of respiration and urea is produced by the decomposition of unused proteins in the liver. It is necessary to remove these wastes from our body as their accumulation is poisonous and harm us. There are different organs which removes waste from the body. These are lungs and kidneys. Our lungs excrete carbon dioxide and kidneys urea. So, the kidney is the main excretory organs of the human body.
nephron:
Nephron, functional unit of the kidney, the structure that actually produces urine in the process of removing waste and excess substances from the blood. There are about 1,000,000 nephrons in each human kidney.
