Q. Which of the following carries oxygen to various parts of human body?
✅ Correct Answer: (A)
Red blood cells
Explanation:
Red blood cells (RBCs) carry oxygen from the lungs to various parts of the body and bring back carbon dioxide to the lungs for exhalation. They contain hemoglobin, a protein that binds to oxygen.
Why other options are incorrect:
- (B) White blood cells – These are involved in immune defense, not oxygen transport.
- (C) Plasma – Plasma carries nutrients, hormones, and waste products, but not oxygen.
- (D) Nerves – Nerves transmit electrical signals, not oxygen.
Explanation by: Mr. Dubey
Red blood cells (RBCs) carry oxygen from the lungs to various parts of the body and bring back carbon dioxide to the lungs for exhalation. They contain hemoglobin, a protein that binds to oxygen.
Why other options are incorrect:
- (B) White blood cells – These are involved in immune defense, not oxygen transport.
- (C) Plasma – Plasma carries nutrients, hormones, and waste products, but not oxygen.
- (D) Nerves – Nerves transmit electrical signals, not oxygen.