This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 472 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 472 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is the key organ in circulatory system? A) The brain. B) The heart. C) The blood. D) The lungs. Show Answer Correct Answer: B) The heart. 2. Fights disease and infection. Made by the lymphatic system. A) White blood cells. B) Red blood cells. C) Circulatory system. D) Blood. Show Answer Correct Answer: A) White blood cells. 3. Tiny, hairlike projections in the airway that move in a wavelike manner. A) Alveoli. B) Cilia. C) Trachea. D) Lungs. Show Answer Correct Answer: B) Cilia. 4. Blood transports ..... and ..... to cells throughout your body. A) Oxygen, nutrients. B) Carbon dioxide, nutrients. C) Oxygen, carbon dioxide. D) None of above. Show Answer Correct Answer: A) Oxygen, nutrients. 5. Which reaction is catalysed by thromboplastin? A) Conversion of prothrombin to thrombin. B) Conversion of prothrombin to fibrin. C) Conversion of thrombin to prothrombin. D) Conversion of fibrinogen to fibrin. Show Answer Correct Answer: A) Conversion of prothrombin to thrombin. 6. The liquid part of the blood which is mostly water that nutrients is dissolved in to. A) Plasma. B) Lava. C) Hemoglobin. D) Platelets. Show Answer Correct Answer: A) Plasma. 7. The right characteristics of Red Blood Cells are ..... A) Contains of hemoglobin, the lifetime up to 4 months, have nucleus. B) Biconcave shape, not elastic, have large surface are. C) Have no nucleus, contains of hemoglobin, biconcave shape. D) Elastic, concave shape, the lifetime up to 3 months. Show Answer Correct Answer: C) Have no nucleus, contains of hemoglobin, biconcave shape. 8. Largest & main artery of the circulatory system. A) Femoral Artery. B) Aorta. C) Carotid Artery. D) Radial Artery. Show Answer Correct Answer: B) Aorta. 9. A system which includes the heart, veins, arteries, and blood transporting substances around the body. A) Circulatory system. B) Heart. C) Blood vessels. D) None of above. Show Answer Correct Answer: A) Circulatory system. 10. Myocardium A) Cardiac Muscle. B) Outermost part of the heart. C) Inner lining of the heart. D) None of above. Show Answer Correct Answer: A) Cardiac Muscle. 11. Which side of the heart is the bicuspid valve found on? A) Left. B) Right. Show Answer Correct Answer: A) Left. 12. It is protected by a tough sac of connective tissue, the pericardium A) Lungs. B) Liver. C) Heart. D) Kidney. Show Answer Correct Answer: C) Heart. 13. This disorder is a problem of not having enough healthy red blood cells or hemoglobin to carry oxygen to the body's tissues. This can cause tiredness, weakness and shortness of breath. There are many forms of this and each type has its own cause. This may be a warning sign of a serious illness. Treatments for this condition might involve taking supplements or having medical procedures. A) Hemophilia. B) Leukemia. C) Anemia. D) Heart Failure. E) Arrhythmia. Show Answer Correct Answer: C) Anemia. 14. What is the top number of blood pressure? A) Atrial systole pressure. B) Ventricular diastole pressure. C) Atrial diastole pressure. D) Ventricular systole pressure. Show Answer Correct Answer: D) Ventricular systole pressure. 15. Which of the following do we now know is the correct order of blood flow in the heart from oxygen poor (deoxygenated) to oxygen rich (oxygenated)? A) R atrium, OR ventricle, L atrium ventricle. B) L atrium ventricle, OR atrium, OR ventricle. C) R ventricle, R atrium, L ventricle, L atrium. D) L ventricle atrium, OR ventricle, OR atrium. Show Answer Correct Answer: A) R atrium, OR ventricle, L atrium ventricle. 16. What is the largest vein in your body? A) Vena cava. B) Pulmonary artery. C) Pulmonary vein. D) Aorta. Show Answer Correct Answer: A) Vena cava. 17. What do we learn from the passage A) That we should always use good construction material. B) That we should persevere. C) That we should be meticulous. D) That we should dream big. Show Answer Correct Answer: C) That we should be meticulous. 18. Arteriovenous A) Vessel. B) Deficiency. C) Vein. D) Artery. Show Answer Correct Answer: D) Artery. 19. This happens when blood flow to your brain is stopped. It is an emergency situation. (Neurological) A) Alzheimer's Disease. B) Zika. C) Stroke. D) None of above. Show Answer Correct Answer: C) Stroke. 20. How many many blood vessels enter and leave the heart? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. ← 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