This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 129 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 129 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Pre-Capillary Sphincters are responsible for what? A) Opening and closing capillaries helping directing blood to certain areas of the body. B) Cardiac Arrest. C) Arteries have thick muscular walls. D) Veins have valves. Show Answer Correct Answer: A) Opening and closing capillaries helping directing blood to certain areas of the body. 2. Why is the circulatory system inportent? A) Because it moves your blood through your body. B) Because it helps you eat. C) Because it helps you breath. D) None of above. Show Answer Correct Answer: A) Because it moves your blood through your body. 3. During ..... circulation, blood leaves the heart oxygenated and returns deoxygenated. A) Systemic. B) Pulmonary. C) Formal. D) Intestinal. Show Answer Correct Answer: A) Systemic. 4. Which type of blood vessel has the thickest layer of smooth muscle in its walls? A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: A) Arteries. 5. What is the main job of the red corpuscles in the blood? A) To clot blood. B) To fight disease. C) To transport oxygen to the body's cells and carry away carbon dioxide from the cells. D) To transport carbon dioxide to the body's cells and carry away oxygen from the cells. Show Answer Correct Answer: C) To transport oxygen to the body's cells and carry away carbon dioxide from the cells. 6. Located between right atrium and right ventricle A) Tricuspid valve. B) Bicuspid valve. C) Pulmonary valve. D) Aortic valve. Show Answer Correct Answer: A) Tricuspid valve. 7. Alveoli are filled with these tiny blood vessels. A) Capillaries. B) Veins. C) Arteries. D) White blood cells. Show Answer Correct Answer: A) Capillaries. 8. Which organ of the respiratory system is also an organ of the muscular system? A) Nose. B) Trachea. C) Lungs. D) Diaphragm. Show Answer Correct Answer: D) Diaphragm. 9. A flap of tissue that prevents blood from flowing backward. A) Atrium. B) Ventricle. C) Valve. D) Epiglottis. Show Answer Correct Answer: C) Valve. 10. This type of circulation travels between the heart and lungs. A) Pulmonary circulation. B) Coronary circulation. C) Systemic circulation. D) Hepatic Portal circulation. Show Answer Correct Answer: A) Pulmonary circulation. 11. Arrhythmias are abnormal heart rhythms caused by weak heart muscles. A) True. B) False. Show Answer Correct Answer: B) False. 12. Which pumps the blood? A) Veins. B) Arteries. C) Heart. D) Capillaries. Show Answer Correct Answer: C) Heart. 13. Your lungs have tiny air sacs called ..... A) Aorta. B) Arteries. C) Ventricles. D) Alveoli. Show Answer Correct Answer: D) Alveoli. 14. What is the role of the pulmonary artery in the circulatory system? A) It carries oxygenated blood from the lungs to the heart. B) It carries deoxygenated blood from the heart to the lungs. C) It carries oxygenated blood from the heart to the body. D) It carries deoxygenated blood from the body to the heart. Show Answer Correct Answer: B) It carries deoxygenated blood from the heart to the lungs. 15. It is located along the lymph vessels they are enlargement called A) Lymph vessels. B) Lymph nodes. C) Antigens. D) Antibodies. Show Answer Correct Answer: B) Lymph nodes. 16. Pumps the oxygen-rich blood to all parts of the body A) Right Ventricle. B) Left Ventricle. C) Right Atrium. D) Left Atrium. Show Answer Correct Answer: B) Left Ventricle. 17. Present in the pus of wounds A) Eosinophils. B) Neutrophils. C) Basophiles. D) Monocytes. Show Answer Correct Answer: B) Neutrophils. 18. When you breathe "in", you take in A) Carbon dioxide. B) Oxygen. C) Nitrogen. D) None of above. Show Answer Correct Answer: B) Oxygen. 19. What is the average heat rate per min? A) 70 to 100. B) 80 to 110. C) 0 to a 100 real quick. D) 40 to 43. Show Answer Correct Answer: A) 70 to 100. 20. Which part of blood helps form scabs on our skin if we cut ourselves? A) Red blood cells. B) White blood cells. C) Platelets. D) Plasma. Show Answer Correct Answer: C) Platelets. ← 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