This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 31 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In which blood vessels do nutrients, gases and waste pass into and out of the blood? A) Arteries. B) Capillaries. C) Veins. D) Both A and B. Show Answer Correct Answer: B) Capillaries. 2. The flow of the blood through the heart to the lungs and back to the heart is called? A) Coronary circulation. B) Lymphatic system. C) Pulmonary circulation. D) Lymph nodes. Show Answer Correct Answer: C) Pulmonary circulation. 3. It is the fluid that carries oxygen from the lungs to the different cells of the body. A) Heart. B) Lymph vessels. C) Blood. D) None of these. Show Answer Correct Answer: C) Blood. 4. Which blood type contains only A antigens? A) AB. B) A. C) B. D) O. Show Answer Correct Answer: B) A. 5. A small flap of tissue that covers the trachea is called the A) Bronchi. B) Larynx. C) Pharynx. D) Epiglottis. Show Answer Correct Answer: D) Epiglottis. 6. What are alleles? A) A a pair of chromosomes. B) B different versions of the same gene. C) C the total number of genes on one chromosome. D) D two genes side by side on the same chromosome. Show Answer Correct Answer: B) B different versions of the same gene. 7. Nutrients and oxygen are able to leave through the thin walls of these small blood vessels through the process of diffusion. What are the blood vessels called? A) Veins. B) Capillaries. C) Arteries. D) None of above. Show Answer Correct Answer: B) Capillaries. 8. 12 A) Aortic valve. B) Mitral valve. C) Tricuspid valve. D) Aortic valve. Show Answer Correct Answer: C) Tricuspid valve. 9. What is the correct order of the following processes? A) Ingestion, digestion, elimination, absorption. B) Digestion, ingestion, absorption, elimination. C) Ingestion, digestion, absorption, elimination. D) Digestion, elimination, ingestion, absorption. Show Answer Correct Answer: C) Ingestion, digestion, absorption, elimination. 10. What are the parts of the blood? A) White blood cells, platelets, water, Red blood vessels. B) Red Blood Cells, water, plasma and platelets. C) White blood cells, platelets, red blood cells, plasma. D) None of the above. Show Answer Correct Answer: C) White blood cells, platelets, red blood cells, plasma. 11. In which of the following is the blood pressure the highest? A) Arteries. B) Veins. C) Capillaries. D) Aorta. Show Answer Correct Answer: D) Aorta. 12. True or false:Blood that is low in oxygen is blue A) True. B) False. Show Answer Correct Answer: B) False. 13. The heart is a ..... sized organ A) Hand. B) Fist. C) Stomach. D) None of above. Show Answer Correct Answer: B) Fist. 14. Cell walls are one cell thick: A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: C) Capillaries. 15. What are tubes that carry blood through the entire body? A) Blood Vessels. B) Plasma. C) The Heart. D) Platelets. Show Answer Correct Answer: A) Blood Vessels. 16. What are the main components of the circulatory system? A) Kidneys, liver, and spleen. B) Lungs, stomach, and brain. C) Muscles, bones, and skin. D) Heart, blood vessels, and blood. Show Answer Correct Answer: D) Heart, blood vessels, and blood. 17. What produces systole blood pressure? A) Contraction of the atria. B) Relaxation of the atria. C) Contraction of the ventricles. D) Relaxation of the ventricles. Show Answer Correct Answer: C) Contraction of the ventricles. 18. What is the name of the protective membrane that surrounds the heart? A) Epicardium. B) Myocardium. C) Endocardium. D) Pericardium. Show Answer Correct Answer: D) Pericardium. 19. This is the liquid substance that makes up 55% of our blood. A) Plasma. B) White Blood Cells. C) Platelets. D) Red Blood Cells. Show Answer Correct Answer: A) Plasma. 20. This organ is a muscular pump that propels blood through the body. A) Lungs. B) Heart. C) Muscle. D) Blood. Show Answer Correct Answer: B) Heart. ← 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