Every 100 mL of oxygenated blood delivers approximately

Options

A. 5 ml of `O_2` to the tissues
B. 5 ml. of `CO_2` to the tissues
C. 4 mL of `CO_2` to the alveoli
D. 4 ml of `O_2` to the alveoli

Answer

To solve the question "Every 100 mL of oxygenated blood delivers approximately," we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question is asking about the delivery of oxygen from oxygenated blood to the tissues. Oxygenated blood is rich in oxygen and is responsible for supplying this oxygen to the body's tissues.

2. **Identify the Options**: The options provided are:
- A) 5 mL of O2 to the tissues
- B) 5 mL of CO2 to the tissues
- C) 4 mL of CO2 to the alveoli
- D) 4 mL of O2 to the alveoli

3. **Eliminate Irrelevant Options**: Since we are dealing with oxygenated blood, it is important to note that:
- Options B and C involve CO2, which is not relevant to oxygenated blood as it primarily delivers oxygen.
- Therefore, we can eliminate options B and C.

4. **Focus on Remaining Options**: We are left with:
- A) 5 mL of O2 to the tissues
- D) 4 mL of O2 to the alveoli

5. **Determine the Correct Delivery**:
- Oxygenated blood delivers oxygen to the tissues, not to the alveoli. The alveoli are where gas exchange occurs, and oxygenated blood has already passed through the alveoli to deliver oxygen to the tissues.
- Thus, option D (4 mL of O2 to the alveoli) is incorrect.

6. **Final Answer**: The correct answer is A) 5 mL of O2 to the tissues. This means that every 100 mL of oxygenated blood delivers approximately 5 mL of oxygen to the tissues.