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  • (a) Define the term excretion. Why should animals excrete waste matter ? (b) Name the main excretory organ of human beings and state the form in which the excretory matter is thrown out of the body.   <div style="float:l

(a) Define the term excretion. Why should animals excrete waste matter ?

(b) Name the main excretory organ of human beings and state the form in which the excretory matter is thrown out of the body.

 

 

 

 
 
 
 
 

Answers (1)

(a) Excretion is a biological process by which harmful metabolic wastes like nitrogenous substances are removed from the body.

Metabolic activities produce waste products such as water, salts, CO_{2} , uric acid and urea. Accumulation of these wastes beyond a certain level inside the body is harmful to the body.

(b) Excretory organs of human are as follows-

\rightarrowKidney

\rightarrowLiver

\rightarrowLungs

\rightarrowstain

Posted by

Sumit Saini

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