Question

What is excretion?

Hint:

Do not confuse excretion with egestion. Excretion deals with cellular metabolic wastes (like urine/sweat), while egestion deals with unabsorbed food (feces).

Answer 1

Step 1: Understanding the Concept:
Cellular metabolism produces various toxic byproducts that must be eliminated to maintain homeostasis.

Step 2: Detailed Explanation:
Excretion is the physiological process of eliminating harmful, toxic, or excess metabolic waste products (such as urea, uric acid, and excess water/salts) from the body of an organism.
This is distinct from egestion (defecation), which is the removal of undigested food materials from the digestive tract.

Step 3: Final Answer:
Excretion is the removal of metabolic wastes.