Perecentage of total blood pumped into human kidneys in each cardiac output is:

Options

A. `15%`
B. `20%`
C. `25%`
D. `50%`

Answer

To solve the question regarding the percentage of total blood pumped into human kidneys in each cardiac output, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Cardiac Output**: Cardiac output refers to the volume of blood the heart pumps per minute. It is a crucial measure of heart function and overall blood circulation in the body.

2. **Identify Renal Blood Flow**: The renal blood flow (RBF) is the volume of blood that is delivered to the kidneys per unit time. This is important because it helps us understand how much blood the kidneys receive from the total cardiac output.

3. **Percentage of Cardiac Output to Kidneys**: In a healthy human, the kidneys receive approximately 25% of the total cardiac output. This means that out of all the blood pumped by the heart, a quarter of it goes to the kidneys.

4. **Quantitative Measure**: The actual volume of blood that the kidneys receive can be quantified. It is typically around 1.2 to 1.3 liters per minute, which corresponds to the 25% of the cardiac output.

5. **Conclusion**: Therefore, the answer to the question is that the percentage of total blood pumped into human kidneys in each cardiac output is 25%.

### Final Answer:
The percentage of total blood pumped into human kidneys in each cardiac output is **25%**.

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