This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 421 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 421 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The heart is a muscular organ that pumps blood throughout the body. A) True. B) False. Show Answer Correct Answer: A) True. 2. This type of blood vessel is the thinnest and allows for the transfer of nutrients and oxygen to the cells of the body. A) Veins. B) Capillaries. C) Arteries. D) None of above. Show Answer Correct Answer: B) Capillaries. 3. When the heart relaxes, the blood A) Flows into the heart from the arteries. B) Flows into the heart from the veins. Show Answer Correct Answer: B) Flows into the heart from the veins. 4. The size of the heart can be compared to the ..... A) Size of a foot. B) Size of a fist. C) Size of your ear. D) None of above. Show Answer Correct Answer: B) Size of a fist. 5. How much blood is in your body? A) 5.6 L. B) 5.6 gal. C) 5.6 pints. D) 5.6 cups. Show Answer Correct Answer: A) 5.6 L. 6. Who is not at risk of high blood pressure? A) Uncle Yut is easily angered. B) Uncle Pom has arteriosclerosis. C) P'Aek exercises regularly. D) Sister Pareena is nearing menopause. Show Answer Correct Answer: C) P'Aek exercises regularly. 7. The cardiovascular system helps maintain homeostasis by A) Sending hunger signals to the brain when energy is low. B) Slowing down to reduce blood pressure when resting. C) Increasing breathing to raise blood pH. D) Filtering out more water for waste excretion. Show Answer Correct Answer: B) Slowing down to reduce blood pressure when resting. 8. The lower parts of the heart called A) Atria. B) Ventricles. C) Valve. D) All of above. Show Answer Correct Answer: B) Ventricles. 9. How many major organs in our body? A) 8. B) 5. C) 6. D) 7. Show Answer Correct Answer: B) 5. 10. Carbon dioxide is considered as ..... A) Food. B) Energy. C) Waste. D) Fun party favor. Show Answer Correct Answer: C) Waste. 11. A person with blood group O can give blood to A. A) True. B) False. Show Answer Correct Answer: A) True. 12. If two parents have type AB blood, what is the probability that their child will have type O blood? A) 0%. B) 25%. C) 50%. D) 100%. Show Answer Correct Answer: A) 0%. 13. Lymphocytes are a type of white blood cell that helps your body fight pathogens. A) True. B) False. Show Answer Correct Answer: A) True. 14. Shape of heart ..... హృదయం ఆకారం ..... A) Triangular. B) Pear shaped. C) Anterior end wider and posterior end narrower. The anterior extremity is wide and the region narrow. D) All the above పైవన్నీ. Show Answer Correct Answer: D) All the above పైవన్నీ. 15. Which of the following is NOT one of the four main blood types? A) A. B) B. C) AB. D) C. Show Answer Correct Answer: D) C. 16. These are between the atria and ventricles that allow blood to flow through the chambers A) Pulmonary Circulation. B) Valves. C) Atria. D) Ventricles. E) Septum. Show Answer Correct Answer: B) Valves. 17. The largest artery in the body (which takes blood from the left ventricle to the rest of the body) is the: A) Aorta. B) Pulmonary Artery. C) Carotid Artery. D) Brachiocephalic Artery. Show Answer Correct Answer: A) Aorta. 18. Which blood vessel carries oxygenated blood to all parts of the body except the lungs? A) Aorta. B) Superior Vena Cava. C) Inferior Vena Cava. D) Pulmonary Artery. Show Answer Correct Answer: A) Aorta. 19. What is the name of the protein found in the skin? A) Hemoglobin. B) Collagen. Show Answer Correct Answer: B) Collagen. 20. Name the two chambers of heart. A) Bicuspid valve and tricuspid valve. B) Ventricles and Atria. C) Aorta and Auricles. D) Ventricles and Aorta. Show Answer Correct Answer: B) Ventricles and Atria. ← 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