This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 652 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 652 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Explain the difference between arteries and veins. A) Arteries carry deoxygenated blood back to the heart, while veins carry oxygenated blood away from the heart. B) Arteries carry deoxygenated blood away from the heart, while veins carry oxygenated blood back to the heart. C) Arteries and veins both carry oxygenated blood away from the heart. D) Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart. Show Answer Correct Answer: D) Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart. 2. When exercising your body needs more ..... A) Oxygen. B) Carbon dioxide. C) Water. D) Lymph nodes. Show Answer Correct Answer: A) Oxygen. 3. Which structure contains the lowest amount of oxygen?A)pulmonary veinB)aortaC)vena cavaD)left ventricle A) Pulmonary vein. B) Aorta. C) Vena cava. D) Left ventricle. Show Answer Correct Answer: C) Vena cava. 4. A soft tissue inside the bone that produces blood cells A) Immune cells. B) Lymph nodes. C) Spleen. D) Bone marrow. Show Answer Correct Answer: D) Bone marrow. 5. Open type of circulatory system is seen in ..... Open type of circulatory system is seen in the following organisms. A) Arthropoda Arthropoda. B) Mollusca Mollusca. C) Urochordata. D) All the above పైవన్నీ. Show Answer Correct Answer: D) All the above పైవన్నీ. 6. A yellow watery fluid in which blood cells are suspended A) Plasma. B) Red blood cells. C) White blood cells. D) Blood platelets. Show Answer Correct Answer: A) Plasma. 7. The smallest blood vessels in the body. A) Trachea. B) Bronchioles. C) Capillaries. D) Veins. Show Answer Correct Answer: C) Capillaries. 8. Heart transports blood to the body in A) 40 secs. B) 20secs. C) 30 seconds. D) 60 seconds. Show Answer Correct Answer: B) 20secs. 9. If I'm checking my pulse for 30 seconds and I count 25 beats, what is my heart rate? A) 25. B) 30. C) 50. D) 75. Show Answer Correct Answer: C) 50. 10. In pulmonary circulation, blood flows through 2 organs, the ..... ? A) Brain and heart. B) Heart and kidneys. C) Heart and liver. D) Lungs and heart. Show Answer Correct Answer: D) Lungs and heart. 11. Veins are thin-walled and floppy blood vessels. Which of the following is the function of veins? A) They carry oxygen-poor blood from the heart to the body parts. B) They carry oxygen-rich blood from the body parts back to the heart. C) They carry oxygen-poor blood from the body parts to the heart. D) They carry oxygen-rich blood from the heart to the body parts. Show Answer Correct Answer: C) They carry oxygen-poor blood from the body parts to the heart. 12. What happens when we exhale (breathe out)? A) The diaphragm contracts and moves upwards. B) The diaphragm relaxes and moves upwards. C) The diaphragm relaxes and moves downwards. D) None of above. Show Answer Correct Answer: B) The diaphragm relaxes and moves upwards. 13. Largest artery in a human body A) Superior Vena Cava. B) Inferior Vena Cava. C) Aorta. D) None of the above. Show Answer Correct Answer: C) Aorta. 14. The primary consumers in a marine ecosystem. A) Phytoplankton. B) Zooplankton. C) Tertiary Consumers. D) Apex Predators. Show Answer Correct Answer: B) Zooplankton. 15. I am the side of your heart that pumps oxygenated blood out through your arteries. A) Right Side of the Heart. B) Left Side of the Heart. Show Answer Correct Answer: A) Right Side of the Heart. 16. The closing of the semilunar valves creates the ..... sound. A) Lubb. B) DUBB. C) Snub. D) FLUB. Show Answer Correct Answer: B) DUBB. 17. What are the structures that separate the atria and ventricles? A) Valves. B) Veins. Show Answer Correct Answer: A) Valves. 18. How is the small intestine related to plasma A) It is not related. B) It is in the circulatory system. C) It helps bring nutrients to the body. D) None of the above. Show Answer Correct Answer: C) It helps bring nutrients to the body. 19. After a long day of work, John feels his legs are heavy and tired. He knows that this sensation is because a certain type of vessel is working hard to carry blood back TO his heart. Which vessel is it? A) Vein. B) Nerve. C) Muscle. D) Artery. Show Answer Correct Answer: A) Vein. 20. Causes the blood vessel to constrict during the blood clotting process A) Thrombin. B) Erythropoietin. C) Hemoglobin. D) Serotonin. Show Answer Correct Answer: D) Serotonin. ← PreviousNext →Related QuizzesScience QuizzesCirculatory System Quiz 1Circulatory System Quiz 2Circulatory System Quiz 3Circulatory System Quiz 4Circulatory System Quiz 5Circulatory System Quiz 6Circulatory System Quiz 7Circulatory System Quiz 8Circulatory System Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books