This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 72 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 72 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are veins? A) Arteries. B) Blood vessels. C) Ventricles. D) Capillaries. Show Answer Correct Answer: B) Blood vessels. 2. Heart is an organ which beats continuously to act as a pump for transport of blood, which carries other substances. The heart is located in the chest cavity with its lower tip slightly tilted towards the left. Your heart is roughly the size of your fist. Pulse is due to A) Blood flowing in arteries. B) Blood flowing in veins. C) Blood flowing through capillaries. D) None of these. Show Answer Correct Answer: A) Blood flowing in arteries. 3. The circulatory system is said to be complete because ..... A) Oxygenated and oxygen-poor blood never mix. B) Oxygenated and oxygen-poor blood always mix. C) Oxygenated and oxygen-poor blood are found everywhere. D) Oxygenated and oxygen-poor blood have the same colour. Show Answer Correct Answer: A) Oxygenated and oxygen-poor blood never mix. 4. What is the name of the instrument we use to hear the heart/ A) Thermometer. B) Pulse ox. C) Stethoscope. D) B/p cuff. Show Answer Correct Answer: C) Stethoscope. 5. Actions which are under your control A) Involuntary. B) Voluntary. C) Brain. D) Vertebrae. Show Answer Correct Answer: B) Voluntary. 6. What is the fluid of the circulatory system? A) Water. B) Blood. C) Milk. D) All of these. Show Answer Correct Answer: B) Blood. 7. To which chamber of the heart does blood arrive from the lungs? A) Right Atrium. B) Left Atrium. C) Right Ventricle. D) Left Ventricle. Show Answer Correct Answer: B) Left Atrium. 8. How many main functions does the circulatory system have? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 9. Organs are not related to the circulatory system. A) Liver. B) Kidneys. C) Heart. D) Hand. Show Answer Correct Answer: D) Hand. 10. Tiny blood vessel that connects arteries to veins A) Arteries. B) Atherosclerosis. C) Capillaries. D) Veins. Show Answer Correct Answer: C) Capillaries. 11. It transports materials and removes waste from cells and to the specific excretory organs. A) Arteries. B) Blood. C) Blood vessels. D) Heart. Show Answer Correct Answer: B) Blood. 12. An electrocardiogram with QRS waves is produced by which step? A) The SA node stimulates the atria. B) AV node sends signal. C) The ventricles of the heart are stimulated to contract. D) The ventricles of the heart relax. Show Answer Correct Answer: C) The ventricles of the heart are stimulated to contract. 13. The functions of the circulatory system are A) To carry waste products from the body's cells. B) To deliver vital substances to the body's cells. C) To fight diseases. D) All of the above. Show Answer Correct Answer: D) All of the above. 14. Which component of the blood protects the body against pathogens? A) Erythrocytes. B) Thrombocytes. C) Leukocytes. D) None of above. Show Answer Correct Answer: C) Leukocytes. 15. Which of the following valves is the third valve that the blood will correctly flow through? A) Tricuspid Valve. B) Mitral Valve. C) Pulmonary Valve. D) Aortic Valve. Show Answer Correct Answer: B) Mitral Valve. 16. What will Sidney do to care for her muscles and her heart? A) She will sleep late and eat Twinkies. B) She will walk and jog every day as well as eat healthy foods. C) She will skip rope and eat potato chips. D) None of above. Show Answer Correct Answer: B) She will walk and jog every day as well as eat healthy foods. 17. The narrow tube that branched from the trachea connected to each of the two lungs A) Bronchi. B) Epiglottis. C) Veins. D) Cilia. Show Answer Correct Answer: A) Bronchi. 18. It protects the other organs of the body. A) Muscular System. B) Skeletal System. C) Cardiovascular System. D) Immune System. Show Answer Correct Answer: B) Skeletal System. 19. To maintain cardiovascular health, foods high in fat should be avoided because? A) They make the blood flow more rapidly than normal. B) They can lead to atherosclerosis. C) They decrease the force with which the ventricles can contract. D) Fat in the diet harms red blood cells. Show Answer Correct Answer: B) They can lead to atherosclerosis. 20. If the SA Node is damaged another spot on the heart can "take over" the pacemaker role ..... what do we call one of these spots if they occur? A) AV Node. B) QRS Complex. C) Ectopic Pacemaker. D) Purkinje Fiber. Show Answer Correct Answer: C) Ectopic Pacemaker. ← 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