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Excretory Products and their Elimination

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
 Describe the accessory excretory organs.

The skin, lungs, liver and large intestine in vertebrates are  the accessory excretory organs.

1. Skin : Human skin possesses sweat glands and sebaceous glands. Sweat is an aqueous fluid containing sodium chloride, lactic acid, urea, amino acids and glucose. It serves mainly as a cooling process. Sweat contains 99.5% of water. The volume of sweat varies from negligible amount to 142 ml. a day depending upon activity and temperature. Sebum also contains excretory products like waxes, sterols and fatty acids. It also keeps skin oily.

2. Lungs : Lungs remove large volume of carbon dioxide produced in the body along with which  some moisture is regularly excreted. Human living removes 182 ml. of C02/hr. and 400ml. of water per day in normal resting conditions volatile materials are also eliminated by lungs.

3. Liver : Liver is the principal organ for the excretion of cholesterol pigments (bilirubin and biliverdin) and inactivated products of steroids, hormones, some vitamins and many drugs.

 

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What is Bowman's capsule?

The double walled cup like structure present at the starting of the renal tubule is Bowman's capsule. It encloses the glomerulus capsule. 
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Name three uricotelic animals.

The uricotelic animals are
1. Birds
2. Reptiles
3. Insects

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What is glomerulonephritis ?

Glomerulonephritis is the inflammation of glomeruli of the kidney. 
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What is the ultimate method for the correction of acute renal failure?

Kidney transplant.
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 What is uremia ?

Uremia is the accumulation of urea in the blood due to the malfunctioning of the kidneys. The urea accumulation is harmful and may lead to kidney failure. 

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