If the cardiac output of a person is 5 lit. and his breathing rate is 18 per min. The amount of blood that will be oxygenated in the lungs per min will be –

Options

A. 5000 ml
B. 4900 ml
C. 70 ml
D. 9000 ml

Answer

To solve the problem, we need to determine the amount of blood that will be oxygenated in the lungs per minute based on the given cardiac output and breathing rate.

### Step-by-Step Solution:

1. **Understand Cardiac Output**:
- Cardiac output is the volume of blood the heart pumps per minute. In this case, it is given as 5 liters per minute.
- 5 liters is equivalent to 5000 milliliters (since 1 liter = 1000 milliliters).

2. **Understand Breathing Rate**:
- The breathing rate is given as 18 breaths per minute. This indicates how many times the person breathes in a minute.

3. **Relation Between Breathing and Blood Oxygenation**:
- Each time a person breathes, oxygen enters the lungs, where it is exchanged for carbon dioxide in the blood.
- The amount of blood that gets oxygenated in the lungs is directly related to the cardiac output, as the blood is continuously circulated through the lungs.

4. **Calculate the Amount of Blood Oxygenated**:
- Since the cardiac output is 5 liters per minute, this is the amount of blood that flows through the lungs each minute.
- Therefore, the amount of blood that will be oxygenated in the lungs per minute is equal to the cardiac output, which is 5000 milliliters.

5. **Conclusion**:
- The correct answer to the question is that the amount of blood that will be oxygenated in the lungs per minute is **5000 milliliters**.

### Final Answer:
The amount of blood that will be oxygenated in the lungs per minute is **5000 ml**.

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