The correct answer is: D. 60 cm3
The heart is a muscular organ that pumps blood throughout the body. It has four chambers: the right atrium, the right ventricle, the left atrium, and the left ventricle. The right atrium and ventricle receive blood from the body and pump it to the lungs. The left atrium and ventricle receive blood from the lungs and pump it to the body.
Each time the heart beats, it pumps a certain amount of blood. This amount is called the stroke volume. The stroke volume is usually about 70 milliliters (mL). However, it can vary depending on a number of factors, such as the person’s age, fitness level, and health status.
The heart beats about 70 to 80 times per minute. This means that it pumps about 5,000 to 6,000 liters of blood per day.
The heart is a very important organ. It is responsible for delivering oxygen and nutrients to the body’s tissues and for removing waste products. Without a healthy heart, the body cannot function properly.
Here is a brief explanation of each option:
- Option A: 30 cm3 is too low. The stroke volume is usually about 70 mL.
- Option B: 40 cm3 is too low. The stroke volume is usually about 70 mL.
- Option C: 50 cm3 is too low. The stroke volume is usually about 70 mL.
- Option D: 60 cm3 is the correct answer. The stroke volume is usually about 70 mL.