Question

Which is the main function of RBC?

• A. To fight diseases in the body
• B. To carry oxygen to different parts of the body
• C. To increase levels of WBC
• D. To arrest bleeding

Answer 1

The correct option is B

To carry oxygen to different parts of the body

The correct option is B

Explanation of the correct option:

1. Red blood cells or RBCs also called Erythrocytes, comprise the red-coloured pigment known as haemoglobin, which comprises iron.
2. Red blood cells help to deliver oxygen to different tissues of the body with the help of the circulatory system.
3. Red blood cells are accountable for the conduction of gases all through the body.
4. It takes up the carbon dioxide from the tissues and brings it to the lungs, and passes oxygen to the tissues of the body.

Explanation of the incorrect option:

Option A:

1. WBCs or white blood cells are the components of the immune system of the body.
2. They assist the body to fight against diseases and infections.
3. The organs and processes of the body, which offer resistance to toxins and infections are collectively known as the immune system.
4. The different types of white blood cells are neutrophils, basophils, eosinophils, lymphocytes, and monocytes.

Option C:

1. The levels of white blood cells or WBCs increase at the time of infection and diseases.
2. At this time the body needs an additional amount of WBCs to fight against the diseases and infections.

Option D:

1. Thrombocytes or platelets are colourless and small fragments of cells in the blood, which produce clots and prevent or stop bleeding.
2. The origin of platelets takes place in the bone marrow and circulates in the blood.

Final answer: The main function of RBCs is to carry oxygen to different parts of the body.