This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 616 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 616 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When we inhale (breathe in), what happens to the pressure in the thorax? A) It increases. B) It stays the same. C) It decreases. D) None of above. Show Answer Correct Answer: C) It decreases. 2. What is the largest organ inside the body? A) Skin. B) Lungs. C) Liver. D) Brain. Show Answer Correct Answer: C) Liver. 3. These transport oxygen and nutrients all over the body. A) Erythrocytes. B) Leukocytes. C) Thrombocytes. D) Lymphocytes. Show Answer Correct Answer: A) Erythrocytes. 4. Patient EG's heart cannot fully pump blood to the lungs. Which chamber is affected? A) Right Atrium. B) Right Ventricle. C) Left Atrium. D) Left Ventricle. Show Answer Correct Answer: B) Right Ventricle. 5. In order for our muscles to get more oxygen when exercising, the blood in our body has to circulate more ..... A) Slowly. B) Quickly. C) Backwards. D) Stop. Show Answer Correct Answer: B) Quickly. 6. Which is not a histological characteristic of the heart? A) Endocardium. B) Myocardium. C) Epicardium. D) Vena cava. Show Answer Correct Answer: D) Vena cava. 7. ..... explanation was that the same blood must keep going round and round A) William Harvey. B) Galen. C) Ibn al-Nafis. D) None of above. Show Answer Correct Answer: A) William Harvey. 8. Which of the following pumps oxygen filled blood from the left atrium to the body? A) Right atrium. B) Right ventricle. C) Left atrium. D) Left ventricle. Show Answer Correct Answer: D) Left ventricle. 9. Identify the adverbs:I am extremely hungry today. A) Extremely, today. B) Hungry, extremely. C) Am hungry. D) Hungry. Show Answer Correct Answer: A) Extremely, today. 10. These are small arteries. A) Veins. B) Atria. C) Arterioles. D) Venules. Show Answer Correct Answer: C) Arterioles. 11. Which term refers to the lungs? A) Hepatic. B) Coronary. C) Pulmonary. D) Thoracic. Show Answer Correct Answer: C) Pulmonary. 12. What TINY blood vessels are throughout the body and are so small the blood can only travel through these tubes in a single file line? A) Capillaries. B) Veins. C) Phloem. D) Atrium. Show Answer Correct Answer: A) Capillaries. 13. The first heart sound occurs when the AV valves ..... A) Close. B) Open. Show Answer Correct Answer: A) Close. 14. The transfer of one person´s blood to another person is called a ..... A) Blood transfusion. B) Blood transfer. C) Blood plasma. D) Blood pressure. Show Answer Correct Answer: A) Blood transfusion. 15. The colour of lymph is A) Red. B) Light yellow. C) White. D) Blue. Show Answer Correct Answer: B) Light yellow. 16. The substance that surrounds most cells is called: A) Intracellular fluid. B) Plasma. C) Lymph. D) Tissue Fluid. Show Answer Correct Answer: D) Tissue Fluid. 17. The blood vessels that carry blood from the heart to the kidneys are called kidneys. A) Pulmonary artery. B) Pulmonary vein. C) Renal artery. D) Renal vein. Show Answer Correct Answer: C) Renal artery. 18. White blood cells fight against ..... A) Carbon Dioxide. B) Viruses and Bacteria. C) Plasma and Platelets. D) None of above. Show Answer Correct Answer: B) Viruses and Bacteria. 19. How many common blood types are there? A) 2. B) 5. C) 3. D) 4. Show Answer Correct Answer: D) 4. 20. Which is Not true about Arteries? A) Carry oxygenated blood. B) Walls are thin. C) Carry blood away from the heart. D) Blood flows under high pressure. Show Answer Correct Answer: B) Walls are thin. ← 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