This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System โ Quiz 258 ๐ Homepage ๐ Download PDF Books ๐ Premium PDF Books Circulatory System Quiz 258 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which side of the heart is responsible for carrying oxygen-rich blood? A) Left side of heart. B) Right side of heart. C) Top of heart. D) Bottom of heart. Show Answer Correct Answer: A) Left side of heart. 2. The longest vein in the body is called the: A) Azygos vein. B) Jugular vein. C) Saphenous vein. D) Hepatic vein. Show Answer Correct Answer: C) Saphenous vein. 3. Blood flows in..... in case of closed type of circulatory system. Closed Circulatory Systems Blood flows in ..... A) Circuits. B) Coelom body cavity. C) Vessels. D) All the above เฐชเฑเฐตเฐจเฑเฐจเฑ. Show Answer Correct Answer: C) Vessels. 4. When does SL valves open? A) Ventricular systole. B) Ventricular diastole. C) Atrial systole. D) Atrial diastole. Show Answer Correct Answer: A) Ventricular systole. 5. How much blood does an average adult have A) 1 litre. B) 3 liters. C) 6 liters. D) 12 liters. Show Answer Correct Answer: C) 6 liters. 6. What is an lymphatic system? A) The lymphatic system is a group of organs tisue that collect the fluid that leaks from the blood. B) The limphatic system is a group of lungs that collect the fluid that leaks from the blood. Show Answer Correct Answer: A) The lymphatic system is a group of organs tisue that collect the fluid that leaks from the blood. 7. Name the blood group that has both antigens A and B A) AB. B) O. C) A. D) B. Show Answer Correct Answer: A) AB. 8. Which of these relationships is harmful? A) Crocodile and plover bird. B) Two scavenger birds fighting to eat a dead animal. C) A flea on a dog. D) A ladybug eating aphids on a plant. Show Answer Correct Answer: C) A flea on a dog. 9. True or False:The left and right Atrium are found in the lower chambers of the heart. A) True. B) False. Show Answer Correct Answer: B) False. 10. Capillaries are delicate blood vessels that exist throughout your body A) True. B) False. Show Answer Correct Answer: A) True. 11. Oxygen gas diffuses to body cells mainly at the part of A) Veins. B) Capillaries. C) Arteries. D) Pulmonary capillaries. Show Answer Correct Answer: B) Capillaries. 12. What are the three parts of the nervous system? A) Brain, spinal cord, nerves. B) Brain, lungs, spinal cord. C) Heart, brain, nerves. D) Brain, nerves, neurons. Show Answer Correct Answer: A) Brain, spinal cord, nerves. 13. What is the function of haemoglobin in red blood cells? A) To carry oxygen. B) To fight infection. C) To regulate body temperature. D) To transport nutrients. Show Answer Correct Answer: A) To carry oxygen. 14. Which blood vessel carries blood back toward the heart? A) Veins. B) Arteries. C) Capillaries. D) Both veins and arteries. Show Answer Correct Answer: A) Veins. 15. The name of the main organ in the circulatory system is the A) Lungs. B) Heart. C) Kidney. D) Artery. Show Answer Correct Answer: B) Heart. 16. Which statement is correct about pulmonary circulation? A) Arteries carry only oxygenated blood. B) Arteries carry only deoxygenated blood. C) Both veins and arteries carry oxygenated blood. D) Both veins and arteries carry deoxygenated blood. Show Answer Correct Answer: C) Both veins and arteries carry oxygenated blood. 17. Which of the following is referred to the pacemaker of the heart? A) Sinoatrial (SA) node. B) Atrioventricular (AV) node. C) Atrioventricular (AV) bundle. D) Purkinje fibers. Show Answer Correct Answer: A) Sinoatrial (SA) node. 18. Generally arteries carry oxygen ..... blood. A) Poor. B) Rich. C) Both. D) None. Show Answer Correct Answer: B) Rich. 19. Which of the following statements about the structure of the heart are true? A) The ventricles are the smaller, superior chambers. B) The ventricles are the larger, superior chambers. C) The ventricles are the larger, inferior chambers. D) The ventricles are the smaller, inferior chambers. Show Answer Correct Answer: C) The ventricles are the larger, inferior chambers. 20. What is called the condition in which blood pressure exceeds 120/80? A) Hypotension Hypotension. B) BP in Low BP. C) Hypertension Hypertension. D) Normal blood pressure is normal blood pressure. Show Answer Correct Answer: C) Hypertension Hypertension. โ PreviousNext โRelated 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 ๐ Back to Homepage ๐ Download PDF Books ๐ Premium PDF Books