Question

name the the organs of excretion in human beings and state their functions.​

Answer 1

Answer:

The paired kidneys are often considered the main organs of excretion. Their primary function is the elimination of excess water and wastes from the bloodstream by the production of urine. ... The kidneys are part of the urinary system, which also includes the ureters, urinary bladder, and urethra.

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Answer 2

Different excretory organs in human body and their functions as follows :

Excretory organs :-

1. Kidney
2. Lungs
3. Skin
4. Liver
5. Intestine
6. Endocrine glands
7. Salivary glands and Lacrimal glands

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Functions :-

➼ Kidney :

• Filters blood and eliminates nitrogenous wastes and other harmful things.
• Filters urea from the blood.

➼ Lungs :

• They remove carbon dioxide and water in respiration.

➼ Skin :

• Sweat and metabolic wastes.
• Sebaceous glands in skin eliminates sebum which contains waxes, sterols hydrocarbons and fatty acids.

➼ Liver :

• Bile pigments bilirubin, biliverdin and urochrome are metabolic wastes of haemoglobin of dead red blood cells.
• Urochrome is eliminated through urine.
• Liver also eliminates cholesterol and derivatives of steroid hormones, extra drug, vitamins and alkaline salts.
• Urea is also formed in liver.

➼ Intestine :

• Excess salts of calcium, magnesium, undigested food material and iron are excreted by epithelial cells of colon for elimination along with faeces.

➼ Endocrine glands :

• These allow excess water to leave the body.
• They are present mainly on the forehead, the bottom of the feet and the palms.

➼ Salivary glands and Lacrimal glands :

• Small amount of nitrogenous wastes are also eliminated through saliva and tears.

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