What substance in these cells actually carries oxygen?

Options

A. RBC
B. WBC
C. Haemoglobin
D. none

Answer

**Step-by-Step Solution:**

1. **Identify the Cells in Question**: The question refers to specific cells that carry oxygen. In this context, we are discussing Red Blood Cells (RBCs).

2. **Understand the Components of Blood**: Blood is a connective tissue that consists of a liquid part called plasma and formed elements, which include red blood cells, white blood cells, and platelets.

3. **Focus on Red Blood Cells (RBCs)**: Among the formed elements, red blood cells are the most abundant and play a crucial role in transporting oxygen throughout the body.

4. **Identify the Substance that Carries Oxygen**: The key substance in red blood cells responsible for carrying oxygen is hemoglobin. Hemoglobin is a protein that binds with oxygen molecules.

5. **Conclusion**: Therefore, the substance in red blood cells that actually carries oxygen is hemoglobin.

**Final Answer**: Hemoglobin.

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