Question

The kidneys in human beings are a part of the system for

• A. Nutrition
• B. Respiration
• C. Excretion
• D. Transportation

Answer 1

The correct option is C

Excretion

The correct option is (C):

Explanation of the correct option:

1. Kidneys are the bean-shaped vital organs located on either side of the body which is the part of the human excretory system.
2. They are responsible for the filtration of the blood with the help of tubular functional units known as nephrons.
3. Excretion can be defined as the process of removal or expulsion of waste from the cells of the body of living organisms.
4. The different organs or parts of the body performing excretion form the excretory system.

Explanation of the incorrect options:

Option (A):

1. Kidneys are not associated with nutrition.
2. Nutrition can be gained by the intake of food.

Option (B):

1. Respiration is the process by which oxygen is inhaled and carbon dioxide is exhaled.
2. Lungs are vital organs associated with respiration.

Option (D):

1. Transportation is the phenomenon by which any molecules, ions, or substances move from one place to another.

Final answer:

The kidneys in human beings are a part of the system for excretion.