This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 165 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 165 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In the serum of the blood and react with the antigen on the red blood cell A) Antibodies. B) Antigens. C) Agglutination. D) Still anti browns. Show Answer Correct Answer: A) Antibodies. 2. These are vessels that return oxygen-poor blood to the heart. They are thin walled. A) Veins. B) Venules. C) Arteries. D) Arterioles. Show Answer Correct Answer: A) Veins. 3. Leaky vessel that allow gases and fluids to exit and enter; red blood cells fit one at a time. A) Arterioles. B) Capillaries. C) Aorta. D) None of above. Show Answer Correct Answer: B) Capillaries. 4. Which of these blood vessels move blood towards the heart? A) Vein. B) Capillary. C) Artery. D) None of above. Show Answer Correct Answer: A) Vein. 5. The process of breathing is called ..... A) Circulation. B) Perspiration. C) Digestion. D) Respiration. Show Answer Correct Answer: D) Respiration. 6. 9 A) Left atrium. B) Right atrium. C) Right ventricle. D) Left ventricle. Show Answer Correct Answer: D) Left ventricle. 7. A more dangerous situation is..... A) Pregnant mother with Rh-and fetus with Rh +. B) Pregnant mother with Rh + and fetus with Rh-. Show Answer Correct Answer: A) Pregnant mother with Rh-and fetus with Rh +. 8. Which vessels allow the exchange of materials between blood and body cells? A) Veins. B) Arteries. C) Capillaries. D) None of above. Show Answer Correct Answer: C) Capillaries. 9. What part of blood is responsible for fighting infections? A) Red blood cells. B) White blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: B) White blood cells. 10. What is the main function of the heart in the circulatory system? A) Transporting oxygen. B) Pumping blood. C) Filtering waste. D) None of above. Show Answer Correct Answer: B) Pumping blood. 11. What do veins do? A) Carry blood from the organs to the heart. B) Store food. C) Nothing. D) Carry blood from the heart to the organs. Show Answer Correct Answer: A) Carry blood from the organs to the heart. 12. The heart beats at least ..... million times during an average person's life. A) 2400. B) 500. C) 3500. D) 1000. Show Answer Correct Answer: A) 2400. 13. What is the function of leukocytes? A) They transport respiratory gases like CO2 and O2. B) They transport bilirubin to the liver. C) They keep us alive. D) They are the first line of defense for immune responses. Show Answer Correct Answer: D) They are the first line of defense for immune responses. 14. My walls are so thin that nutrients & oxygen can go through to the cells that need them. Also, cells send wastes & carbon dioxide through my walls to get back in the bloodstream. A) Arteries. B) Capillaries. C) Veins. D) None of above. Show Answer Correct Answer: B) Capillaries. 15. The visceral pericardium is the same as the A) Epicardium. B) Myocardium. C) Parietal pericardium. D) Endocardium. Show Answer Correct Answer: A) Epicardium. 16. Fights infections A) White blood cells. B) Red blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: A) White blood cells. 17. What type of blood vessel brings blood back to the heart? A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: B) Veins. 18. What is the function of the aorta in the circulatory system? A) To carry blood from the heart to the rest of the body. B) To carry blood from the body back to the heart. C) To filter waste from the blood. D) To produce blood cells. Show Answer Correct Answer: A) To carry blood from the heart to the rest of the body. 19. Which word is non-finite verb?"The broken mirror reflected the images in a distorted manner." A) Broken. B) Reflected. C) Distorted. D) Broken / reflected. E) Broken / distorted. Show Answer Correct Answer: E) Broken / distorted. 20. What is the meaning of the word part-emia? A) Blood condition. B) Anemia. C) Cold. D) Heart. Show Answer Correct Answer: A) Blood condition. ← 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