This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 332 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 332 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What percent of the blood are red blood cells? A) Less than 1%. B) 45%. C) 55%. D) None of above. Show Answer Correct Answer: B) 45%. 2. CABG-a procedure to assist blood flow to the heart by replacing a vessel or bypassing it to redirect blood flow around an obstruction stands for A) Cardiac arteriosclerosis grafting. B) Cardiac arrest bypass grafting. C) Coronary artery bypass grafting. D) Carotid artery bypass grafting. Show Answer Correct Answer: C) Coronary artery bypass grafting. 3. What travels through your veins? A) Oxygen. B) Blood. C) Bones. D) None of above. Show Answer Correct Answer: B) Blood. 4. The heart is enclosed in a double layered membranous sac called A) Pericardium. B) Meninges. C) Pleural membrane. D) None of the above. Show Answer Correct Answer: A) Pericardium. 5. Which of the following represents the circulatory system? A) . B) . C) . D) . Show Answer Correct Answer: A) . 6. Thin flap of tissue that acts like a one-way door A) Artery. B) Septum. C) Valve. D) Vein. Show Answer Correct Answer: C) Valve. 7. Which blood vessel has thin walls and contains valves? A) Artery. B) Vein. C) Capillary. D) None of above. Show Answer Correct Answer: B) Vein. 8. When does the oxygen enter the blood? A) In the capalaries. B) In the aorta before it goes through the body. C) In the lungs. D) In the vena cava. Show Answer Correct Answer: C) In the lungs. 9. Which one is NOT a blood type? A) A. B) AB. C) O. D) C. Show Answer Correct Answer: D) C. 10. How many percent is plasma in blood? A) 55%. B) 44%. C) 1%. D) None of above. Show Answer Correct Answer: A) 55%. 11. The circulatory system is made up of blood vessels, What are there? A) Arteries and veins. B) Veins and plasmatic. C) Arteries and blood. D) Arteries. Show Answer Correct Answer: A) Arteries and veins. 12. These cells are disc-shaped and carry oxygen to the body. A) White blood cells. B) Platelets. C) Skin. D) Red blood cells. Show Answer Correct Answer: D) Red blood cells. 13. White blood cells that multiply abnormally is called ..... A) Narrow bone cancer/leukaemia. B) Emphysema. C) Asthma. D) None of above. Show Answer Correct Answer: A) Narrow bone cancer/leukaemia. 14. If a person does not have enough erythrocytes, they would have difficulty: A) Carrying oxygen. B) Clotting blood. C) Fighting infection. D) Transporting antibodies. Show Answer Correct Answer: A) Carrying oxygen. 15. The ..... pressure of the cardiovascular system is the force of the blood on the arteries when the ventricles relax. A) Diastolic. B) Systolic. C) Aortic. D) Atrial. Show Answer Correct Answer: A) Diastolic. 16. What is NOT true about lymph nodes? A) They filter lymph and become swollen in response to infection. B) They contain a large number of white blood cells. C) They are mainly located around your neck, armpit, & groin. D) They are not important for your survival. Show Answer Correct Answer: D) They are not important for your survival. 17. Which of the following statements is not true for RBCs? A) RBCs are formed in the red bone marrow in the adults. B) RBCs are devoid of nucleus in most of the mammals. C) RBCs have an average life span of 120 days. D) The cells are biconvex in shape. Show Answer Correct Answer: D) The cells are biconvex in shape. 18. From the right ventricle where does the blood go to? A) Lungs. B) Aorta. C) Left Atrium. D) Left Ventricle. Show Answer Correct Answer: A) Lungs. 19. What does the pulmonary vein do? A) Key organ in circulatory system. B) Brings oxygen-rich blood from lungs to body. C) Brings oxygen-rich blood from lungs to heart. D) Brings oxygen-poor blood from lungs to heart. Show Answer Correct Answer: C) Brings oxygen-rich blood from lungs to heart. 20. ..... are the site where substances are exchanged between the blood and body cells. A) Capillaries. B) Cells. C) Arteriole. D) None of above. Show Answer Correct Answer: A) Capillaries. ← 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