This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 154 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 154 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An organ in the chest that sends blood all around the body A) Capillaries. B) Blood. C) Heart. D) Pump. Show Answer Correct Answer: C) Heart. 2. Group of cells that sends electric currents to the heart and makes sure the heart beats at a steady pace A) Pacemaker. B) Atrium. C) Fast. D) Ventricle. Show Answer Correct Answer: A) Pacemaker. 3. This type of blood cell carries oxygen through the body and determines blood type. A) Red blood cells. B) Platelets. C) White blood cells. D) Plasma. Show Answer Correct Answer: A) Red blood cells. 4. The building blocks of starch are A) Glycerol. B) Amino acids. C) Sugars. D) Fatty acids. Show Answer Correct Answer: C) Sugars. 5. Water composes about ..... percent of the plasma volume. A) 25. B) 51. C) 72. D) 92. Show Answer Correct Answer: D) 92. 6. What is the primary job of red blood cells? A) To fight infections. B) To carry oxygen to all the cells in the body. C) To clot the blood. D) To carry nutrients to cells. Show Answer Correct Answer: B) To carry oxygen to all the cells in the body. 7. The small air sacs that are surrounded by blood vessels are the ..... A) Alveoli. B) Bronchi. C) Bronchioles. D) Trachea. Show Answer Correct Answer: A) Alveoli. 8. The abbreviation for beats per minute A) Bpm. B) Bp. C) P. D) CHF. Show Answer Correct Answer: A) Bpm. 9. True or false. The circulatory system supply blood with oxygen. A) True. B) False. Show Answer Correct Answer: B) False. 10. How many chambers in the heart of a fish? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 11. Which blood vessel carries blue blood? A) Veins. B) Arteries. C) Both. D) Neither. Show Answer Correct Answer: D) Neither. 12. Largest artery in the human body: A) Pulmonary artery. B) Femoral artery. C) Aorta. D) Carotid artery. Show Answer Correct Answer: C) Aorta. 13. What happens to blood in the lungs? A) It mixes with oxygen and is pumped to all cells. B) It returns back to the heart. C) It is carried to and from the heart in tubes. D) It is attacked by white blood cells. Show Answer Correct Answer: A) It mixes with oxygen and is pumped to all cells. 14. The blood vessels that carry oxygenated blood from the lungs to the left atrium. A) Pulmonary vein. B) Pulmonary artery. C) Aorta. D) Vena cava. Show Answer Correct Answer: A) Pulmonary vein. 15. The lung is where gases, such as oxygen and carbon dioxide pass between the ..... and the ..... A) Carbon dioxide and the left side of the heart. B) Atmosphere and the blood. C) Blood vessels and organs. D) Earth's core and the mantle. Show Answer Correct Answer: B) Atmosphere and the blood. 16. How many valves does the heart have? A) 1. B) 3. C) 4. D) 2. Show Answer Correct Answer: C) 4. 17. What is cartilage? A) Joints that connect bone to tissue. B) Connective tissue that acts as balance for the body. C) Connective tissue near joints that act as a shock absorber. D) A piece of tissue that is attached to the scapula. Show Answer Correct Answer: C) Connective tissue near joints that act as a shock absorber. 18. The name of the process done by the cells in our body to generate energy is ..... A) Photosynthesis. B) Excretion. C) Respiration. D) Digestion. Show Answer Correct Answer: C) Respiration. 19. If you were in the pulmonary artery, what structure would you flow to next? A) Pulmonary vein. B) Aortic valve. C) Right atrium. D) Lungs. Show Answer Correct Answer: D) Lungs. 20. When the heart ....., it fills with blood coming from the veins A) RELAXES. B) CONTRACTS. Show Answer Correct Answer: A) RELAXES. ← 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