Question

What is excretion? Why is it necessary for any living organism?

Hint:

Excretion removes metabolic wastes and maintains body balance.

Answer 1

What is Excretion?

Excretion is the biological process by which living organisms remove metabolic waste products and harmful substances from their body. During various life processes such as respiration, digestion and metabolism, waste products like carbon dioxide, urea, excess salts and water are formed. These waste materials must be removed from the body to maintain internal balance.

Examples of Excretory Products:
– Carbon dioxide (produced during respiration)
– Urea (formed from breakdown of proteins)
– Excess water and salts
– Other toxic metabolic wastes

Why is Excretion Necessary?

Excretion is necessary for the following reasons: 1. Removal of Toxic Substances:
Metabolic wastes such as urea and carbon dioxide are harmful if accumulated. Their removal prevents poisoning of body cells.

2. Maintaining Internal Balance (Homeostasis):
Excretion helps regulate the balance of water, salts and other substances in the body.

3. Proper Functioning of Cells:
Accumulation of waste products can interfere with normal cellular activities. Removal ensures smooth functioning of organs.

4. Prevention of Diseases:
If wastes are not removed properly, they can damage tissues and cause serious health problems.

Conclusion:
Excretion is the process of removing waste products from the body. It is essential for maintaining health, preventing toxicity and ensuring the proper functioning of living organisms.