Question

The mechanism for removing harmful substances formed as a result of various activities from the body is called

• A. Digestive system
• B. Circulatory system
• C. Excretory system
• D. Nervous system

Hint:

Distinguish between egestion and excretion. Egestion is the removal of undigested food (feces) via the digestive system. Excretion is the removal of metabolic waste products (like urea in urine) via the excretory system.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The question asks for the name of the organ system responsible for eliminating metabolic wastes and other non-useful materials from the body.

Step 2: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{Digestive system: Breaks down food and absorbs nutrients. It eliminates undigested food as feces, but this is egestion, not excretion of metabolic waste. } \\ \bullet & \text{Circulatory system: Transports oxygen, nutrients, hormones, and wastes throughout the body. It carries waste to the excretory organs but doesn't remove it from the body. } \\ \bullet & \text{Excretory system: This system is specifically responsible for the removal of metabolic wastes (like urea, uric acid) and other harmful substances from the body fluids to maintain homeostasis. Key organs include the kidneys, lungs, skin, and liver. The process is called excretion. } \\ \bullet & \text{Nervous system: The body's command center, controlling actions and transmitting signals between different parts of the body. } \\ \end{array}\]

Step 3: Final Answer:
The mechanism for removing harmful metabolic substances from the body is managed by the excretory system.