In humans, the volume of blood pumped out by each ventricle per minute is

Options

A. 1040 mL
B. 5 L
C. 2.5 L
D. 1290 mL

Answer

To solve the question regarding the volume of blood pumped out by each ventricle per minute in humans, we will follow these steps:

### Step 1: Understand the Concept of Cardiac Output
- **Definition**: Cardiac output (CO) is the volume of blood pumped by each ventricle per minute.

### Step 2: Know the Formula for Cardiac Output
- **Formula**: The formula for calculating cardiac output is:
\[ \text{Cardiac Output (CO)} = \text{Stroke Volume (SV)} \times \text{Heart Rate (HR)} \]

### Step 3: Identify Stroke Volume and Heart Rate
- **Stroke Volume (SV)**: This is the amount of blood pumped by each ventricle with each heartbeat. For a typical human heart, the stroke volume is approximately 70 ml.
- **Heart Rate (HR)**: This is the number of heartbeats per minute. A normal resting heart rate is about 75 beats per minute.

### Step 4: Calculate Cardiac Output
- **Calculation**:
\[ \text{CO} = \text{SV} \times \text{HR} = 70 \, \text{ml/beat} \times 75 \, \text{beats/min} = 5250 \, \text{ml/min} \]

### Step 5: Convert to Liters
- Since 1 liter = 1000 ml, we convert 5250 ml to liters:
\[ 5250 \, \text{ml} = 5.25 \, \text{liters} \]

### Step 6: Compare with Given Options
- **Options**:
1. 1040 ml
2. 5 liters
3. 2.5 liters
4. 190 ml

- The closest value to our calculated cardiac output (5.25 liters) is option 2, which states 5 liters.

### Conclusion
- Therefore, the volume of blood pumped out by each ventricle per minute in humans is approximately **5 liters**.

---