Percentage of `O_2` transported from lungs to the tissues through RBC is

Options

A. 3
B. 67
C. 97
D. 75

Answer

To determine the percentage of O₂ transported from the lungs to the tissues through red blood cells (RBCs), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Role of Hemoglobin**:
- Hemoglobin is a protein found in red blood cells that binds to oxygen (O₂) in the lungs and carries it to the tissues.

2. **Percentage of Oxygen Transported**:
- It is known that a significant percentage of oxygen is transported in the blood via hemoglobin.

3. **Quantifying the Transport**:
- Research and physiological studies indicate that approximately 97% of the oxygen that enters the bloodstream from the lungs is carried by hemoglobin in the red blood cells.

4. **Conclusion**:
- Therefore, the percentage of O₂ transported from the lungs to the tissues through RBCs is **97%**.

### Final Answer:
The percentage of O₂ transported from the lungs to the tissues through RBCs is **97%**.

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