This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System โ Quiz 99 ๐ Homepage ๐ Download PDF Books ๐ Premium PDF Books Circulatory System Quiz 99 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Capillaries connect arteries to veins and exchange materials A) True. B) Decisions. Show Answer Correct Answer: A) True. 2. Circulation in which blood flows to the heart once in a circulation is known as..... A) Double circulation. B) Triple circulation. C) Single Circulation. D) All the above เฐชเฑเฐตเฐจเฑเฐจเฑ. Show Answer Correct Answer: C) Single Circulation. 3. The liquid portion of blood is called A) Hemoglobin. B) Plasma. C) Lymphocyte. D) Platelets. Show Answer Correct Answer: B) Plasma. 4. In the walls of the heart, what do you call the layers of tissue that helps blood to flow according to its path? A) Epicardium. B) Cardiac muscle. C) Endocardium. D) Myocardium. Show Answer Correct Answer: D) Myocardium. 5. The formed elements which make up the liquid part of the blood is called? A) RBC. B) WBC. C) Plasma. D) Platelets. Show Answer Correct Answer: C) Plasma. 6. What is the role of the heart in the circulatory system? A) To get rid of waste in the blood. B) To pump blood throughout the body. C) To maintain body temperature. D) To make blood cells. Show Answer Correct Answer: B) To pump blood throughout the body. 7. The circulatory system contains bones A) False. B) True. Show Answer Correct Answer: A) False. 8. Heart attacks are the number 1 cause of death for men and women in the US A) True. B) False. Show Answer Correct Answer: A) True. 9. Why would venous blood have a slightly different pH than arterial blood? A) The presence of carbon dioxide in venous blood makes blood more basic. B) The presence of carbon dioxide in venous blood makes blood slightly more acidic. C) The presence of oxygen in venous blood makes blood slightly more acidic. D) The presence of oxygen in venous blood makes blood more basic. Show Answer Correct Answer: B) The presence of carbon dioxide in venous blood makes blood slightly more acidic. 10. About 55% of blood is a watery liquid called A) Platelets. B) Plasma. C) Hormones. D) None of above. Show Answer Correct Answer: B) Plasma. 11. Fish have a ..... chambered heart? A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: C) 2. 12. The ..... is a protective covering which keeps the heart from rubbing against your lungs and chest wall. A) Chamber. B) Septum. C) Valve. D) Pericardium. Show Answer Correct Answer: D) Pericardium. 13. Red blood cells contain ..... that is red and gives blood its color. It links up with oxygen and carries this oxygen to all parts of the body. A) Myoglobin. B) Red Ferrine. C) Plasma. D) Hemoglobin. Show Answer Correct Answer: D) Hemoglobin. 14. The only artery which carries deoxygenated blood is called A) Hepatic artery. B) Pulmonary artery. C) Aorta. D) Renal artery. Show Answer Correct Answer: B) Pulmonary artery. 15. The ..... is the portion of circulatory system that carries oxygenated blood from the heart to the body and returns deoxygenated blood back to the heart. A) Pulmonary Circuit. B) Systemic Circuit. Show Answer Correct Answer: B) Systemic Circuit. 16. What part of blood carries oxygen? A) Plasma. B) White blood cells. C) Red blood cells. D) Platelets. Show Answer Correct Answer: C) Red blood cells. 17. Which chamber of the human heart receives blood from the lungs? A) Right atrium. B) Right ventricle. C) Left atrium. D) Left ventricle. Show Answer Correct Answer: B) Right ventricle. 18. The four chambers of the heart are A) Right atrium, right ventricle, left house, left in. B) Right atrium, right ventricle, left atrium, left ventricle. C) Right atrium, right ventricle, left oxygen, right carbon. D) Right atrium, right ventricle, left mscle, right muscle. Show Answer Correct Answer: B) Right atrium, right ventricle, left atrium, left ventricle. 19. Where direction does CO2 go into A) Alveoli. B) Capillaries. Show Answer Correct Answer: A) Alveoli. 20. How do the atria and ventricles work together? A) The atria pump blood out of the heart while the ventricles refill. B) The atria and ventricles contract at the same time. C) The atria refill while the ventricles are pumping blood out. D) The ventricles separate the blood from the atria. Show Answer Correct Answer: C) The atria refill while the ventricles are pumping blood out. 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