Question

Draw a well labelled diagram of L.S. of the human kidney?

Answer 1

Hint:The process by which removal of unwanted or waste material from the body of a living organism takes place is called excretion.

Complete answer:

On the basis of type of waste material excreted from the body of the organism, excretion can be categorised into different types such as ammonotelism, ureotelism, uricotelism, ammonotelism and guanotelism.
The group of organs that function in elimination of unwanted waste make a system called an excretory system. The excretory system in human beings includes a pair of kidney, ureter, urethra and urinary bladder. Kidneys are a pair of bean-shaped organs. They are located on the left and right side of retroperitoneal space. They are reddish to dark brown colored and the function of the kidney is filtration of Urine. The different functions of the kidney are, control of volume of various body fluids, acid-base balance, electrolyte concentration etc. The nephron is the structural and functional unit of the kidney, each human adult kidney contains around a million nephrons. The nephron contains Malpighian body and tubules from which water and other materials are separated from the blood and excrete urine.

Note:In some human beings, kidneys lose their ability of filtration and in such cases, filtration by an artificial method is done which is called dialysis. The process of removal of waste material artificially due to lack of function of the kidney, is called dialysis.