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Excretory Products and their Elimination

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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.



What is the ultimate method for the correction of acute renal failure?

Kidney transplant.

Name three uricotelic animals.

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


 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. 


What is glomerulonephritis ?

Glomerulonephritis is the inflammation of glomeruli of the kidney. 

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.