This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 669 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 669 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which organ pumps and circulates blood through the human body? A) Lungs. B) Liver. C) Pancreas. D) Heart. Show Answer Correct Answer: D) Heart. 2. When looking at the heart, which side is the right? A) My right. B) My left. C) At the apex. D) At the base. Show Answer Correct Answer: B) My left. 3. The veins and the arteries together are called A) Blood vessels. B) Lungs. C) System. D) None of above. Show Answer Correct Answer: A) Blood vessels. 4. ..... are narrow and very thin walled blood vessels A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: C) Capillaries. 5. The smallest type of blood vessels are A) Arteries. B) Veins. C) Capillaries. D) Aorta. Show Answer Correct Answer: C) Capillaries. 6. What is the role of the atria and ventricles in the heart? A) The atria receive blood into the heart, while the ventricles pump blood out of the heart to the rest of the body. B) The atria pump blood out of the heart, while the ventricles receive blood into the heart. C) The atria and ventricles both pump blood out of the heart. D) The atria and ventricles both receive blood into the heart. Show Answer Correct Answer: A) The atria receive blood into the heart, while the ventricles pump blood out of the heart to the rest of the body. 7. Which of the following is true about transportation in multicellular organisms? A) Has a large total surface area to volume ratio. B) Has size that are usually small and thin. C) The exchange of substances between body cells and the external environment cannot happen through diffusion. D) The body cells are close to the external environment. Show Answer Correct Answer: C) The exchange of substances between body cells and the external environment cannot happen through diffusion. 8. Which statement about capillaries is FALSE? A) They are numerous. B) They decrease surface area. C) They allow for blood cells to move in a single file. D) They are the blood vessel where gases and nutrients are exchanged. Show Answer Correct Answer: B) They decrease surface area. 9. True or False:The circulatory system delivers oxygen to body cells. A) True. B) False. Show Answer Correct Answer: A) True. 10. What is the function of your cappilaries? A) Carry blood to the heart. B) Carry blood to the lungs. C) Carry blood away from the heart. D) Connect the veins and arteries. Show Answer Correct Answer: D) Connect the veins and arteries. 11. The bundle of nerves that controls the heartbeat is called the ....., and it is in the ..... of the heart. A) AV node, Left Atrium. B) AV node, Right Ventricle. C) SA node, Left Atrium. D) SA node, Right Atrium. Show Answer Correct Answer: D) SA node, Right Atrium. 12. The vessel walls are thin and inelastic A) Arteries (pulses) [6]. B) Venous Vessels (Back) [6]. Show Answer Correct Answer: B) Venous Vessels (Back) [6]. 13. A vascular system disease involving hardening of the arteries is called ..... A) Vascular stenosis. B) Arteriosclerosis. C) Athrosclerosis. D) Hemostatic retention. Show Answer Correct Answer: B) Arteriosclerosis. 14. Which component of blood loses its nucleus? A) White blood cells. B) Red blood cells. C) Platelets. D) Hemoglobin. Show Answer Correct Answer: B) Red blood cells. 15. Where does the blood go after it goes into the pulmonary arteries? A) Lungs. B) Heart. C) Head. D) Hands. Show Answer Correct Answer: A) Lungs. 16. What is the part of the Digestive System that brings the food from the mouth to the stomach? A) Trachea. B) Esophagus. C) Villi. D) Alveoli. Show Answer Correct Answer: B) Esophagus. 17. Which is NOT a material carried in the blood? A) Wastes. B) Hormones. C) Nutrients. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 18. Which is the correct direction of blood flow? A) Right atrium-right ventricle-pulmonary artery. B) Right atrium-left atrium-pulmonary artery. C) Left ventricle-pulmonary artery-aorta. D) Left ventricle-left atrium-aorta. Show Answer Correct Answer: A) Right atrium-right ventricle-pulmonary artery. 19. Ml is the normal rate for..... A) Thrombocytes (blood clots). B) Erythrocytes (red blood cells). C) Leukocytes (white blood cells). D) Blood plasma. Show Answer Correct Answer: A) Thrombocytes (blood clots). 20. Which of the following is NOT a chamber of the heart? A) Left and Aorta. B) Left Atrium. C) Right Ventricle. D) Left Ventricle. Show Answer Correct Answer: A) Left and Aorta. ← 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