Question

Explain the process of excretion in human being

Answer 1

Answer:

Excretion is a process by which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. ... Excretion is an essential process in all forms of life. For example, in mammals urine is expelled through the urethra, which is part of the excretory system.

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Answer 2

Explanation:

• Excretion is a process by which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. ... Excretion is an essential process in all forms of life. For example, in mammals urine is expelled through the urethra, which is part of the excretory system.

• 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.

• Different organisms follow different modes of excretion such as kidney, lungs, skin and eyes depending on their habitat and food habit.

• For example- Aquatic animals excrete waste in the form of ammonia, while birds and insects excrete mainly uric acid. Humans produce urea as the major excretory product.

The human excretory system organs include:

• A pair of kidneys

• A pair of ureters

• A urinary bladder

• A urethra

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