This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 145 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 145 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which component of blood carries oxygen from the lungs to the body tissues? A) Red blood cells. B) White blood cells. C) Platelets. D) Plasma. Show Answer Correct Answer: A) Red blood cells. 2. What's the name of the vessel that transports oxygenated blood from the lungs to the heart? A) Pulmonary artery. B) Pulmonary vein. C) Vena Cava. D) Aorta. Show Answer Correct Answer: B) Pulmonary vein. 3. This system allows the contracting of muscles to happen and helps the digestive system to digest food. A) Muscular System. B) Skeletal System. C) Respiratory System. D) Nervous System. Show Answer Correct Answer: A) Muscular System. 4. Platelets release a clotting protein into the blood that initiates chemical reaction A) Fibrin. B) Clot. C) Leukocytes. D) Circulation. Show Answer Correct Answer: A) Fibrin. 5. The top chambers of the heart that receive and store blood are called- A) Ventricles. B) Atria. C) Valves. D) Phalanges. Show Answer Correct Answer: B) Atria. 6. What do you call an organ inside the heart that prevents the backflow of blood and ensures that blood flows only in one direction? A) Atrium. B) Ventricles. C) Valves. D) Pericardium. Show Answer Correct Answer: B) Ventricles. 7. Systole and diastole are where, respectively, the heart muscle is ..... A) Contracting and relaxing. B) Relaxing and contracting. C) Contracting and resisting. D) Relaxing and resisting. Show Answer Correct Answer: A) Contracting and relaxing. 8. The force of blood on the walls of blood vessels is called? A) Atherosclerosis. B) Blood pressure. C) Hypertension. D) None of above. Show Answer Correct Answer: B) Blood pressure. 9. ..... are blood cells that carry oxygen and carbon dioxide inside the body A) Platelets. B) Red blood cells. C) White blood cells. D) Valve. Show Answer Correct Answer: B) Red blood cells. 10. What takes blood back to the heart? A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: B) Veins. 11. A group of organs working together forms a/an A) Organ systems. B) Tissue system. C) Cell system. D) Molecular system. Show Answer Correct Answer: A) Organ systems. 12. Hemoglobin is attached to ..... A) Red blood cells. B) White blood cells. C) Platelets. D) Plasma. Show Answer Correct Answer: A) Red blood cells. 13. Chest pains due to too little O2 to the heart A) Angina. B) Fainting. C) Aneurysm. D) Tachycardia. Show Answer Correct Answer: A) Angina. 14. The right upper chamber of the heart that receives blood returning to the heart A) Right atrium. B) Left atrium. C) Right ventricle. D) Left ventricle. Show Answer Correct Answer: A) Right atrium. 15. Arteries carry blood away from the heart to the rest of the body. A) True. B) False. Show Answer Correct Answer: A) True. 16. An object that can permit or block the flow of material through some region A) Pulse. B) Valve. C) Vein. D) Ventricle. Show Answer Correct Answer: B) Valve. 17. The push of blood against the walls of blood vessels in ..... A) Capillaries. B) Blood pressure. C) Arteries. D) One. Show Answer Correct Answer: B) Blood pressure. 18. The average human heart is about the size of ..... A) A lemon. B) A human fist. C) A softball. D) A football. Show Answer Correct Answer: B) A human fist. 19. Performing blood clotting This includes aspects..... A) Erythrocytes (Red blood cells). B) Leukocytes (White blood cells). C) Blood plasma. D) Thrombocytes (Blood clots). Show Answer Correct Answer: D) Thrombocytes (Blood clots). 20. What component of the blood carries oxygen to various parts of the body? A) Platelet. B) Plasma. C) Cardiovascular system. D) Haemoglobin. Show Answer Correct Answer: D) Haemoglobin. ← 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