1. What is the main function of the human circulatory system?
a) Transporting oxygen and nutrients to the body's cells
b) Removing waste products from the body
c) Regulating body temperature
d) All of the above
2. Which of the following is NOT a component of the human circulatory system?
a) Heart
b) Lungs
c) Blood vessels
d) Kidneys
3. What is the role of red blood cells in the circulatory system?
a) Carrying oxygen to body tissues
b) Carrying carbon dioxide away from body tissues
c) Producing antibodies to fight infections
d) Both a) and b)
4. The human circulatory system is a closed loop system. What does this mean?
a) Blood flows in one direction through the body
b) Blood flows in two directions through the body
c) Blood flows both in and out of the body
d) None of the above
5. Which chamber of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Right ventricle
c) Left atrium
d) Left ventricle
6. What causes the heart to beat?
a) Nervous system signals
b) Hormonal signals
c) Electrical impulses generated within the heart
d) All of the above
7. Which type of blood vessel carries oxygenated blood away from the heart to the rest of the body?
a) Arteries
b) Veins
c) Capillaries
d) Lymph vessels
8. What is the purpose of valves in the circulatory system?
a) To prevent backflow of blood
b) To regulate blood pressure
c) To control blood clotting
d) None of the above
9. What is the average adult resting heart rate?
a) 60-70 beats per minute
b) 70-80 beats per minute
c) 80-90 beats per minute
d) 90-100 beats per minute
10. Which of the following factors can increase the risk of cardiovascular disease?
a) Smoking
b) High blood pressure
c) High cholesterol levels
d) All of the above
Answers:
1. d) All of the above
2. d) Kidneys
3. d) Both a) and b)
4. a) Blood flows in one direction through the body
5. c) Left atrium
6. c) Electrical impulses generated within the heart
7. a) Arteries
8. a) To prevent backflow of blood
9. a) 60-70 beats per minute
10. d) All of the above
Human circulatory system quiz
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