Define 'excretion' .Describe the excretory system of human beings
Answers
The waste from the body which should thrown out is called excretion.
The excretory system in human beings includes a pair of kidneys, a pair of ureters , urinary bladder and urethra. Kidneys remove the waste products from the blood and urine .kidneys are two bean shaped structure .the basic filtration of kidney unit of kidney is a cluster of thin walled blood capillaries called as Nephron. Each nephron has a cup shaped thon walled upper end called Bowman's capsule which contains a bundle of blood capillaries called glomerulus.
The process of removal of toxic wastes from the body of an organism is called excretion.
The wastes that are produced in human body are removed by the process of excretion. Human body consists of a number of excretory organs such as liver, skin, kidneys etc. But there is a specialized system in humans that helps to purifies blood. That is called excretory system. It consists of Kidneys, ureters, urethra, urinary bladder .
Kidneys are placed in lower abdomen and bean like shaped. They filter the blood and removes toxins from the blood. It also reabsorbs the essential ions and substances from the filtrate. The final toxins are collected and removed from the body in the from of urine.
The urine is 95% of water in composition and rest it contains urea and other wastes.
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