This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 439 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 439 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Type of blood circulatory system in amphibians is: A) Incomplete double circulatory system. B) Complete double circulatory system. C) Single blood circulatory system. D) None of above. Show Answer Correct Answer: A) Incomplete double circulatory system. 2. The ..... is the thick muscular wall that seperates the two sides of the heart. A) Atria. B) Ventricles. C) Valve. D) Septum. Show Answer Correct Answer: D) Septum. 3. Which of the following is a function of the white blood cells? A) Circulation. B) Clot blood. C) Fight Infection. D) Heal wounds. Show Answer Correct Answer: C) Fight Infection. 4. What is the role of hemoglobin in the blood? A) It helps in clotting of blood. B) It carries oxygen from the lungs to the rest of the body. C) It fights against infections. D) It carries carbon dioxide from the body to the lungs. Show Answer Correct Answer: B) It carries oxygen from the lungs to the rest of the body. 5. Which element in the blood is round and colourless? Red blood cells A) Plasma. B) Platelets. C) White blood cells. D) Red blood cells. Show Answer Correct Answer: B) Platelets. 6. Which of the following best describes the circulatory system? A) The system that helps the body obtain oxygen from the environment. B) The system that protects the body form viruses. C) The system that delivers nutrients and oxygen to the body cells. D) The system that regulates body temperature. Show Answer Correct Answer: C) The system that delivers nutrients and oxygen to the body cells. 7. What is the function of white blood cells in the circulatory system? A) Transporting oxygen. B) Fighting infection. C) Clotting blood. D) Regulating body temperature. Show Answer Correct Answer: B) Fighting infection. 8. Which of the following organelles is responsible for cellular respiration? A) Mitochondria. B) Nucleus. C) Endoplasmic Reticulum. D) Ribosome. Show Answer Correct Answer: A) Mitochondria. 9. Anemia is a disorder where there are too few ..... in the blood. A) Lymphocytes. B) Platelets. C) Red blood cells. D) White blood cells. Show Answer Correct Answer: C) Red blood cells. 10. How does blood get oxygen? A) Through absorption in the stomach. B) By filtering through the kidneys. C) When it is pumped through the liver. D) When it is pumped from the heart to the lungs and mixes with inhaled air. Show Answer Correct Answer: D) When it is pumped from the heart to the lungs and mixes with inhaled air. 11. Is a blood vessel that carries blood away from the heart. A) Cardiovascular system. B) Blood. C) Artery. D) None of above. Show Answer Correct Answer: C) Artery. 12. Which part of the blood is correctly paired with its job? A) Red blood cells-transport wastes and hormones. B) Plasma-carries oxygen. C) Platelets-produce antibodies. D) White blood cells-fight infection. Show Answer Correct Answer: D) White blood cells-fight infection. 13. ..... takes place when blood travels from the heart, through the lungs, and back to the heart. A) Pulmonary circulation. B) Systemic circulation. Show Answer Correct Answer: A) Pulmonary circulation. 14. What is Red Blood Cells main job? A) Clot the Blood. B) Fight Infectious Disease. C) Transport Oxygen. D) None of above. Show Answer Correct Answer: C) Transport Oxygen. 15. Large blood vessels that carry blood away from the heart. A) Arteries. B) Veins. C) Arterioles. D) Venules. Show Answer Correct Answer: A) Arteries. 16. What do you call the tubes that serve as a passageway for blood to reach the different parts of the body? A) Blood. B) Blood vessels. C) Veins. D) Ventricles. Show Answer Correct Answer: B) Blood vessels. 17. A blood cell that fights infection by destroying microscopic, diseasecausing organisms A) White blood cell. B) Red blood cell. C) Platelet. D) Capillary. Show Answer Correct Answer: A) White blood cell. 18. This node of the heart is known as the natural "pacemaker" ? A) Because of the difference. B) AV Node. C) Nodes of Ranvier. D) Lymph Nodes. Show Answer Correct Answer: A) Because of the difference. 19. The largest vein in the human body is: A) Vena cava. B) Pulmonary vein. C) Aorta. D) Intrajugular vein. Show Answer Correct Answer: A) Vena cava. 20. Why do we need oxygen? A) To breathe. B) To eat. C) For respiration. D) For photosynthesis. Show Answer Correct Answer: C) For respiration. ← 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