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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
Give the functions of kidney.

Functions of kidney :

1. Excretion : Kidneys pass out metabolic waste products.

2. Regulation of pH value : Kidneys help in the removal of excess of acids from the blood and thus help in regulating pH value.

3. Osmoregulation : Kidneys help in the maintenance of the osmotic balance in the body.

4. Secretion of renin : The kidneys secrete renin which converts angiotensinogen into angiotensin. It stimulates the limbs of uriniferous tubules to absorb Na+ ions from blood.

5. Elimination of excess of salts : The kidneys elminate excess of salts from blood and thus help in regulating blood pressure.

6. Regulation of blood pressure : By controlling the fluid balance in the body, kidney nephron regulates blood pressure.

7. Homeostasis : As kidney removes various unwanted material from the blood, it helps in keeping the internal environment of the body constant.

8. Elimination of other substances : Kidney removes toxic substances like drugs, pigments etc. from the blood.


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. 

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

Kidney transplant.