This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 81 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 81 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What kind of blood does the heart receive from the body and pump into the lungs? A) Oxygenated. B) Red blood cells. C) Deoxygenated. D) Blue blood. Show Answer Correct Answer: C) Deoxygenated. 2. What is the strongest (thickest) part of the heart? A) Right atrium. B) Right ventricle. C) Left ventricle. D) Left atrium. Show Answer Correct Answer: C) Left ventricle. 3. Which structure is responsible for separating deoxygenated blood from oxygenated blood? A) The fence. B) Septum. C) Vessel. D) Aorta. Show Answer Correct Answer: B) Septum. 4. Valve between the ventricles and arteries A) Mitral valve and tricuspid valve. B) Pulmonary valve and aortic. Show Answer Correct Answer: B) Pulmonary valve and aortic. 5. The name of the heart's chamber that main purpose is to pump blood is called ..... A) Aorta. B) Ventricle. C) Atrium. D) Veins. Show Answer Correct Answer: B) Ventricle. 6. Blood that contains large amounts of carbon dioxide flows from the body into the ..... atrium of the heart. A) Left. B) Right. C) Top. D) Bottom. Show Answer Correct Answer: B) Right. 7. If someone's blood pressure is 145 / 95, they have ..... A) Hypertension. B) Normal blood pressure. C) Hypotension. D) None of above. Show Answer Correct Answer: A) Hypertension. 8. During a Science lesson, the teacher told the students that unicellular organisms do not have a transport system. Which of the following questions should the pupils ask? A) Do substances enter unicellularorganisms by diffusion?. B) Do substances enter unicellularorganisms by transfusion?. C) Do unicellular organisms need only sunlightfor survival?. D) Do unicellular organismsproduce their own food?. Show Answer Correct Answer: A) Do substances enter unicellularorganisms by diffusion?. 9. Oozing out of water drops from injured parts of plant is called A) Bleeding. B) Guttation. C) Transpiration. D) None of above. Show Answer Correct Answer: A) Bleeding. 10. Which of the following is NOT a part of lymphatic system? A) Tonsils. B) Lymph node. C) Lacteal. D) Heart. Show Answer Correct Answer: D) Heart. 11. Blood vessels with high blood pressure A) Veins. B) Capillaries. C) Arteries. D) Valves. Show Answer Correct Answer: C) Arteries. 12. The universal blood donor is: A) AB positive. B) AB negative. C) O positive. D) O negative. Show Answer Correct Answer: D) O negative. 13. The major blood vessel that carries oxygenated blood out of the heart is the ..... A) Left atrium. B) Right atrium. C) Aorta. D) Vena cava. Show Answer Correct Answer: C) Aorta. 14. What is bradycardia A) Fast heart rate. B) Fast breathing. C) Slow breathing. D) Slow heart rate. Show Answer Correct Answer: D) Slow heart rate. 15. Approximately, how long does it take for all of the blood to circulate one time through the body? A) 1 minute. B) 5 minutes. C) 1 hour. D) 1 day. Show Answer Correct Answer: A) 1 minute. 16. Oxygen moves between the respiratory system and the circulatory system when it transfers from ..... to ..... A) Alveoli, capillaries. B) Bronchi, trachea. C) Capillaries, veins. D) Bronchi, capillaries. Show Answer Correct Answer: A) Alveoli, capillaries. 17. What type of blood does the left side of the heart carry A) Deoxygenated. B) Oxygenated. Show Answer Correct Answer: B) Oxygenated. 18. The diaphragm muscle moves down and ribs up and outward A) Inhale. B) Exhale. Show Answer Correct Answer: A) Inhale. 19. What is the pumping organ of circulatory system? A) Veins. B) Heart. C) Arteries. D) Capillaries. Show Answer Correct Answer: B) Heart. 20. What is the function of valves? A) To prevent mixing of oxygenated and deoxygenated blood. B) To transport blood in one direction. C) To prevent backflow of blood. D) None of above. Show Answer Correct Answer: C) To prevent backflow of blood. ← 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