What is the form in which oxygen gas is trans- ported from lungs to the bloodstream?

Options

A. Carboamino-haemoglobin
B. Bicarbonate ions
C. Oxyhaemoglobin
D. Glucose

Explanation

To answer the question "What is the form in which oxygen gas is transported from lungs to the bloodstream?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Oxygen Transport**:
- Oxygen is essential for cellular respiration and is transported from the lungs to the body's tissues.

2. **Role of Hemoglobin**:
- In the bloodstream, oxygen binds to hemoglobin, a protein found in red blood cells. Hemoglobin has a high affinity for oxygen.

3. **Formation of Oxyhemoglobin**:
- When oxygen enters the lungs, it diffuses into the blood and binds to hemoglobin, forming a complex known as oxyhemoglobin.

4. **Oxyhemoglobin in Bloodstream**:
- Oxyhemoglobin is the primary form in which oxygen is transported in the bloodstream. It allows for efficient transport of oxygen to tissues throughout the body.

5. **Conclusion**:
- Therefore, the correct answer to the question is that oxygen gas is transported from the lungs to the bloodstream in the form of oxyhemoglobin.

### Final Answer:
The form in which oxygen gas is transported from lungs to the bloodstream is **Oxyhemoglobin**.

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