How much oxygen, blood supplies to tissues in one circulation in normal condition `,-`

Options

A. `75%`
B. `4%`
C. `25%`
D. `20%`

Answer

To answer the question "How much oxygen does blood supply to tissues in one circulation in normal conditions?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Oxygen Supply**: Blood supplies oxygen to tissues through a process involving oxygenated blood, which is carried by arteries.

2. **Partial Pressure of Oxygen**: The partial pressure of oxygen in the arteries is a key factor in determining how much oxygen is available for tissues. In normal conditions, this partial pressure ranges from 75 to 95 mmHg.

3. **Oxygen Saturation**: In normal physiological conditions, the oxygen saturation of hemoglobin in arterial blood is typically around 95-100%. This means that a significant amount of oxygen is carried by the blood.

4. **Oxygen Delivery to Tissues**: During one circulation, the blood delivers a substantial portion of the oxygen it carries to the tissues. The question provides options for how much oxygen is supplied, which are 75%, 4%, 25%, or 20%.

5. **Selecting the Correct Option**: Based on physiological data, it is known that approximately 75% of the oxygen carried by the blood is delivered to the tissues during one complete circulation under normal conditions.

6. **Conclusion**: Therefore, the correct answer to the question is that blood supplies **75%** of oxygen to tissues in one circulation in normal conditions.

### Final Answer:
**75%**

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