This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 287 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 287 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Responsible for carrying o2 and co2; red blood cells A) Erythrocytes. B) Leukocytes. C) Thrombocytes. D) None of above. Show Answer Correct Answer: A) Erythrocytes. 2. Which part of blood contain haemoglobin? A) White blood cells. B) Platelets. C) Red blood cells. D) Plasma. Show Answer Correct Answer: C) Red blood cells. 3. The purpose of valves in the heart is to ..... A) Keep blood in the atria. B) Stop blood from flowing into the ventricles. C) Stop the backflow of blood. D) Allow air from the lungs to get into the blood. Show Answer Correct Answer: C) Stop the backflow of blood. 4. True or False:Arteries carry blood back to the heart. A) True. B) False. Show Answer Correct Answer: B) False. 5. What is the smallest blood vessel? A) Artery. B) Vein. C) Capillary. D) None of above. Show Answer Correct Answer: C) Capillary. 6. How many chambers are in the human heart? A) 9. B) 10. C) 4. D) 2. Show Answer Correct Answer: C) 4. 7. Which of the following organs pump blood throughthe blood vessels A) Brain. B) Heart. C) Kidney. D) Lungs. Show Answer Correct Answer: B) Heart. 8. Thinnest vessels A) Arteries. B) Capillaries. C) Veins. D) None of above. Show Answer Correct Answer: B) Capillaries. 9. The comparison of blood components is..... A) 60% plasma40% blood cells. B) 50% plasma50% blood cells. C) 55% plasma45% blood cells. D) 45% blood cells 55% plasma. Show Answer Correct Answer: C) 55% plasma45% blood cells. 10. Of the following, which is NOT involved in pulmonary circulation? A) Coronary artery. B) Left atrium. C) Right ventricle. D) Pulmonary vein. Show Answer Correct Answer: A) Coronary artery. 11. Is the formation of fat deposits inside of arteries, which causes blood flow to slow down or stop completely A) Strokes. B) Heart attack. C) Arteriosclerosis. D) Caring for your circulation system. Show Answer Correct Answer: C) Arteriosclerosis. 12. The lower two chambers of the heart are called ..... A) Atria. B) Capillaries. C) Kidneys. D) Ventricles. Show Answer Correct Answer: D) Ventricles. 13. Which of the following carries oxygenated blood? A) Pulmonary veins. B) Vena cava. C) Pulmonary arteries. D) Renal vein. Show Answer Correct Answer: A) Pulmonary veins. 14. What is the advantages of double circulation? A) Blood can be pumped to the entire body at higher pressure. B) The surface of gaseous exchange will be increased. Show Answer Correct Answer: A) Blood can be pumped to the entire body at higher pressure. 15. What is the job (function) of the cranium, or skull? A) Protect the heart. B) Protect the brain. C) Protect the feet. D) None of above. Show Answer Correct Answer: B) Protect the brain. 16. What is the other term for Red Blood Cell (RBC)? A) Fibrin. B) Thrombocytes. C) Leukocytes. D) Erythrocytes. Show Answer Correct Answer: D) Erythrocytes. 17. The heart is approximately the size of a ..... A) Grape. B) Fist. C) Hand. D) Foot. Show Answer Correct Answer: B) Fist. 18. The left side of the heart is the ..... pump A) Systemic. B) Pulmonary. Show Answer Correct Answer: A) Systemic. 19. Hemoglobin is present in which type of blood cells? A) Red blood cells (erythrocytes). B) White blood cells (leukocytes). C) Platelets. D) Plasma. Show Answer Correct Answer: A) Red blood cells (erythrocytes). 20. Another main function of the respiratory system is to remove ..... gas from the body. This can be toxic to the cells if it is not removed. A) Nitrogen. B) Oxygen. C) Carbon dioxide. D) Helium. Show Answer Correct Answer: C) Carbon dioxide. ← 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