This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 86 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 86 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. These are the smallest blood vessels. A) Chambers. B) Capillaries. C) Veins. D) Arteries. Show Answer Correct Answer: B) Capillaries. 2. The largest veins in the body are the ..... A) Aorta. B) Vena cava. C) Atrium. D) Ventricle. Show Answer Correct Answer: B) Vena cava. 3. The ..... is the pump that keeps blood moving. A) Blood. B) Cell. C) Oxygen. D) Heart. Show Answer Correct Answer: D) Heart. 4. The ..... node is the junction between atria and ventricles. This receives the electrical signal from the SA node. A) Atrioventricular (AV). B) Sinoatrial (SA). C) Bundle branches. D) Purkinje fibers. E) Bundle of His. Show Answer Correct Answer: A) Atrioventricular (AV). 5. The arteries branch into A) Blood capillaries. B) Veins. C) Lymphatic capillaries. D) None of above. Show Answer Correct Answer: A) Blood capillaries. 6. A top chamber in our heart is called a A) Atrium. B) Ventricle. C) Cavern. D) None. Show Answer Correct Answer: A) Atrium. 7. Carbon dioxide is transported from ..... A) Lungs to body cells. B) Body cells to lungs. C) Kidneys to lungs. D) Brain to lungs. Show Answer Correct Answer: B) Body cells to lungs. 8. ..... is when you have low Blood Pressure (less than 90/60) A) Arrhythmia. B) Atherosclerosis. C) Heart murmurs. D) Hypertension. E) Hypotension. Show Answer Correct Answer: E) Hypotension. 9. Heart disease occurs when part of the brain doesn't get enough blood due to a clot or a burst blood vessel. A) Heart attack. B) Atherosclerosis. C) Stroke. D) None of above. Show Answer Correct Answer: C) Stroke. 10. The cells that have no nuclei in the blood structure are ..... A) Red blood cells. B) Blood platelets. C) White blood cells. D) No correct answer. Show Answer Correct Answer: A) Red blood cells. 11. Which of these are NOT part of plasma? A) Sugar, Salt, Protein, Fat. B) Platelets and Blood Cells. C) Water. D) None of above. Show Answer Correct Answer: B) Platelets and Blood Cells. 12. The entrance to the ascending aorta is guarded by the ..... valve. A) Aortic Semilunar. B) Pulmonary Semilunar. C) Tricuspid. D) Bicuspid. Show Answer Correct Answer: A) Aortic Semilunar. 13. The scientific name of a platelet. A) Leukocyte. B) Hemocyte. C) Erythrocyte. D) Thrombocyte. Show Answer Correct Answer: D) Thrombocyte. 14. When the cells use up oxygen, it becomes more ..... A) Red. B) Blueish red. Show Answer Correct Answer: B) Blueish red. 15. Which valve sits between the right atrium and right ventricle of the heart? A) Pulmonary. B) Bicuspid. C) Aortic. D) Tricuspid. Show Answer Correct Answer: D) Tricuspid. 16. The top number read from the sphygmomanometer is A) The pushing pressure from the heart. B) The relaxed pressure from the heart. C) This is not the answer, don't click here. D) This is not the answer, don't click here. Show Answer Correct Answer: A) The pushing pressure from the heart. 17. The ..... side of heart is used to deal with deoxygenated blood. A) Upper. B) Right. C) Left. D) Lower. Show Answer Correct Answer: B) Right. 18. What is the function of platelets in the circulatory system? A) Transporting oxygen. B) Fighting infection. C) Clotting blood. D) Regulating body temperature. Show Answer Correct Answer: C) Clotting blood. 19. The heart needs it's own blood supply. It is a muscle, afterall. If the heart does not get enough blood, a ..... may result. A) Stroke. B) Pulmonary embolism. C) Heart Attack. D) Ulcer. Show Answer Correct Answer: C) Heart Attack. 20. Which type of blood vessel carries blood away from the heart? A) Lymphatic vessels. B) Capillaries. C) Arteries. D) Veins. Show Answer Correct Answer: C) Arteries. ← 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