What is excretion?

What is excretion?

• A. The absorption of nutrients
• B. Removal of waste from the body
• C. The breathing process
• D. The production of enzymes

Answer: (B)

Excretion is the removal of waste from the body. It keeps the internal environment balanced by eliminating metabolic wastes like urea, excess water, salts, and carbon dioxide. This description matches what excretion does. Absorption is taking in nutrients, breathing is about gas exchange, and producing enzymes is making proteins that catalyze reactions. The body clears wastes through organs such as the kidneys, lungs, and skin, with the liver helping process substances for elimination.

Excretion is the removal of waste from the body. It keeps the internal environment balanced by eliminating metabolic wastes like urea, excess water, salts, and carbon dioxide. This description matches what excretion does. Absorption is taking in nutrients, breathing is about gas exchange, and producing enzymes is making proteins that catalyze reactions. The body clears wastes through organs such as the kidneys, lungs, and skin, with the liver helping process substances for elimination.