Blood will lose maximum Oxygen when pass through

Options

A. (1) alveolar capillaries
B. (2) left atrium
C. (3) arteries
D. (4) tissue capillaries

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where blood loses the maximum amount of oxygen as it circulates through the body.

2. **Analyzing the Options**:
- **Option 1: Alveolar Capillaries**: These are the capillaries surrounding the alveoli in the lungs where oxygen is taken up from the air. Here, blood gains oxygen, not loses it.
- **Option 2: Left Atrium**: This chamber of the heart receives oxygenated blood from the lungs. Therefore, the oxygen concentration is still high here, indicating no loss of oxygen.
- **Option 3: Arteries**: Arteries carry oxygen-rich blood away from the heart to various parts of the body. There is minimal gas exchange in the arteries, so the oxygen level remains high.
- **Option 4: Tissue Capillaries**: These capillaries are located near the tissues where oxygen is delivered to cells. The cells consume oxygen for energy, leading to a significant drop in the oxygen concentration in the blood as it passes through these capillaries.

3. **Conclusion**: The blood loses the maximum amount of oxygen when it passes through the tissue capillaries because this is where oxygen is utilized by the tissues for metabolic processes.

4. **Final Answer**: The correct option is **4. Tissue Capillaries**.

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