The amount of blood to be pumped out by each ventricle / minute is -

Options

A. Stroke volume
B. Cardiac output
C. Tidal volume
D. Residual volume

Answer

To find the amount of blood pumped out by each ventricle per minute, we need to calculate the cardiac output. Here’s how to do it step by step:

### Step 1: Understand the Definitions
- **Stroke Volume (SV)**: This is the amount of blood pumped by each ventricle during one cardiac cycle (one heartbeat).
- **Heart Rate (HR)**: This is the number of heartbeats per minute.

### Step 2: Gather the Values
- The average stroke volume for each ventricle is approximately **70 ml**.
- The average heart rate is about **72 beats per minute**.

### Step 3: Calculate Cardiac Output
Cardiac Output (CO) can be calculated using the formula:
\[ \text{Cardiac Output (CO)} = \text{Stroke Volume (SV)} \times \text{Heart Rate (HR)} \]

### Step 4: Substitute the Values
Now, substituting the values into the formula:
\[ \text{CO} = 70 \, \text{ml/beat} \times 72 \, \text{beats/min} \]

### Step 5: Perform the Calculation
Calculating the above:
\[ \text{CO} = 70 \times 72 = 5040 \, \text{ml/min} \]

### Step 6: Convert to Liters
Since 1000 ml equals 1 liter, we can convert the result:
\[ \text{CO} = 5040 \, \text{ml/min} \approx 5 \, \text{liters/min} \]

### Conclusion
Thus, the amount of blood pumped out by each ventricle per minute is approximately **5 liters**.

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