The process in which the toxic waste is remove from the body of an organism is called excretion. Because the toxic waste in the body harms an organism and must be removed continuously.
EXCRETION IN HUMANS
The excretory system of human beings consist of the following main organs: two kidney, two ureter, bladder and urethra. The shape of kidney is like a bean on the back side of our body. The blood is continuously passed through the kidney. The renal artery brings the dirty blood in the kidney. The function of kidney is to remove the toxic waste and poisonous substance urea, salts and excess water from our blood and excrete them in a yellowish liquid called urine. The kidney remove the unwanted substance from our blood. The clean blood is carried away from the kidney by renal vein.
The each kidney is made up of a large number of excretory units called nephrons. Nephron has a cup shaped at its upper end which called the bowman capsule. The other end f bowman capsule is called tubule.
The bowman capsule and the tubule both make a nephron. The bowman capsule contain a bundle of blood capillaries called glomerulus. the function of glomerulus is to filter out the blood passing through it.
KIDNEY FAILURE
The kidney failure is due to the an infection in the kidney, an injury to kidney, very high blood pressure, high sugar level, can damage your kidney and stops them. Complete failure of kidney allow the urea and other substances to build up in the blood.
The best long term solution for kidney failure is kidney transplant. And then the patient with kidney failure is treated on a kidney machine called Dialysis.
DIALYSIS
The blood of a person having kidney failure can be cleaned regularly by using a kidney machine called dialysis. The process used for cleaning the blood of a person by separating the waste substance urea, axis water etc from it is called dialysis.
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