This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 294 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 294 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What organ removes waste from the body? A) Intestines. B) Kidneys. C) Blood. D) Stomach. Show Answer Correct Answer: B) Kidneys. 2. Which blood vessels have the thinnest walls? A) Vena cava. B) Aorta. C) Small veins. D) Capillaries. Show Answer Correct Answer: D) Capillaries. 3. Blood delivers ..... to all the cells. A) Oxygen. B) Carbon dioxide. C) Water. D) Sucks. Show Answer Correct Answer: A) Oxygen. 4. Which of the following take place when atria of the heart contracts? A) Blood transfer from atrium to ventricle. B) Blood transfer from ventricle to atrium. C) Blood transfer out of the heart. D) Blood enters the heart. Show Answer Correct Answer: A) Blood transfer from atrium to ventricle. 5. Red blood cells contain a protein called hemoglobin that carries A) Carbon dioxide. B) Oxygen. C) Water. D) Glucose. Show Answer Correct Answer: B) Oxygen. 6. Definition of pulmonary: A) Relating to the blood. B) Relating to the right. C) Relating to the lungs. D) Relating to oxygen. Show Answer Correct Answer: C) Relating to the lungs. 7. What do we call the large lymphatic vessels that drain lymph back into the circulatory system? A) Lymph capillaries. B) Lymph veins. C) Lymph nodes. D) Lymph ducts. Show Answer Correct Answer: D) Lymph ducts. 8. The respiratory system is responsible for taking in oxygen. What is the name of the pipe that carries the oxygen from the nose and mouth to the lungs? A) Alvelou. B) Small Intestine. C) Liver. D) Trachea. Show Answer Correct Answer: D) Trachea. 9. Oxygenated blood comes from where? A) Body. B) Lungs. Show Answer Correct Answer: B) Lungs. 10. Communication between two blood vessels A) Thrombosis. B) Areterioles. C) Anastomosis. D) Venules. Show Answer Correct Answer: C) Anastomosis. 11. Capillary A) This type of blood vessel is the thinnest and allows for the transfer of nutrients and oxygen to the cells of the body. B) A flap of tissue that prevents blood from flowing backward. C) Prevents oxygen-rich and oxygen-poor blood from mixing in the heart. D) These are the oxygen carrying cells of the blood. Show Answer Correct Answer: A) This type of blood vessel is the thinnest and allows for the transfer of nutrients and oxygen to the cells of the body. 12. Which chamber does oxygenated blood enter the heart first? A) Left Ventricle. B) Right Atrium. C) Left Atrium. D) Right Ventricle. Show Answer Correct Answer: C) Left Atrium. 13. The Blood which heart pumps to lungs is A) Deoxygenated blood. B) Lymph fluid. C) Oxygenated blood. D) Tissue fluid. Show Answer Correct Answer: A) Deoxygenated blood. 14. What are the two phases of a heartbeat? A) Systole and Diastole. B) Interphase and Telophase. C) Mitosis and osmosis. D) Green and Red. Show Answer Correct Answer: A) Systole and Diastole. 15. How many percent is red blood cells? A) 55%. B) 44%. C) 1%. D) None of above. Show Answer Correct Answer: B) 44%. 16. Neutrophils and lymphocytes are examples of: A) Erythrocytes. B) Leukocytes. C) Platelets. D) Thrombocytes. Show Answer Correct Answer: B) Leukocytes. 17. A clogged artery can lead to a heart attack. A) True. B) False. Show Answer Correct Answer: A) True. 18. Blood pressure increases A) Diastole. B) Systole. Show Answer Correct Answer: B) Systole. 19. What stops the body from bleeding? A) A band-aid. B) Red blood cells. C) Platelets. D) Tape. Show Answer Correct Answer: C) Platelets. 20. The ..... forces the blood into the ....., which pumps it to the lungs through the ..... A) Right atrium, right ventricle, pulmonary artery. B) Right ventricle, right atrium, pulmonary artery. C) Pulmonary artery, right atrium, right ventricle. D) Right ventricle, pulmonary artery, right atrium. Show Answer Correct Answer: A) Right atrium, right ventricle, pulmonary artery. ← 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