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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 various nitrogenous waste products.

Nitrogenous waste products : Ammonia , urea, uric acid are some nitrogenous waste products excreted by our body. 

1. Ammonia : It is formed by the deamination of amino acids during the protein metabolism. Ammonia is highly toxic. It is highly soluble in water and needs a large amount of water for its excretion. The animals which excret ammonia are called ammonotelic organisms. For expmple bony fishes , aquatic amphibians and insects.

 2. Urea : It is less toxic than ammonia. Most mammals, fishes and amphibians excrete their nitrogenous waste products in the form of urea. Process of excretion of urea is called ureotelism and such animals are called ureotelic. It needs less water for excretion, hence helps in the conservation of water. Animals like mammals, terrestrial amphibians and marine fishes excrete urea. 

3. Uric acid : Reptiles and birds excrete uric acid and are called uricotelic. The uric acid is is excreted in the foprm of pellet and paste with minimum loss of water. 



What is glomerulonephritis ?

Glomerulonephritis is the inflammation of glomeruli of the kidney. 

 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. 


Name three uricotelic animals.

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


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. 

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

Kidney transplant.