How much of the total blood volume is present in heart ?

Options

A. 0.025 l/min
B. 0.17 l/min
C. 0.09 l/min
D. 5.25 l/min

Answer

To determine how much of the total blood volume is present in the heart, we can follow these steps:

### Step 1: Understand the Concept of Cardiac Output
Cardiac output (CO) is the amount of blood the heart pumps in one minute. It is a key indicator of the heart's efficiency and overall cardiovascular health.

### Step 2: Use the Formula for Cardiac Output
The formula for cardiac output is:
\[ \text{Cardiac Output (CO)} = \text{Stroke Volume (SV)} \times \text{Heart Rate (HR)} \]
Where:
- Stroke Volume (SV) is the amount of blood pumped by the heart with each beat.
- Heart Rate (HR) is the number of heartbeats per minute.

### Step 3: Insert Values into the Formula
Given:
- Stroke Volume (SV) = 70 milliliters (mL) per beat
- Heart Rate (HR) = 72 beats per minute

Now, we can calculate the cardiac output:
\[ \text{CO} = 70 \, \text{mL/beat} \times 72 \, \text{beats/min} \]

### Step 4: Calculate Cardiac Output
Perform the multiplication:
\[ \text{CO} = 70 \times 72 = 5040 \, \text{mL/min} \]

### Step 5: Convert to Liters
Since 1 liter = 1000 mL, we convert the cardiac output from milliliters to liters:
\[ \text{CO in liters} = \frac{5040 \, \text{mL}}{1000} = 5.04 \, \text{liters/min} \]

### Step 6: Conclusion
The total blood volume present in the heart is represented by the cardiac output, which is approximately 5.04 liters per minute.

### Final Answer
Thus, the total blood volume present in the heart is approximately **5.04 liters per minute**.

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