This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 123 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 123 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The parts of the circulatory system are A) Brain, spinal cord and nerves. B) Lungs, nose and mouth. C) Heart, blood and blood vessels. D) Stomach, small intestine and large instestine. Show Answer Correct Answer: C) Heart, blood and blood vessels. 2. What is the name of the protein found on the red blood cell? A) Hemoglobin. B) Collagen. Show Answer Correct Answer: A) Hemoglobin. 3. Where can you feel your heart beat and count your heart rate? A) Checking the Belly Button. B) Pulse on your Head. C) Stethoscope on the Knee. D) Pulse on the Wrist. Show Answer Correct Answer: D) Pulse on the Wrist. 4. The carotid arteries A) Bring blood to the head. B) Bring blood away from the head. C) Transport oxygen-poor blood. D) Are in the thorax. Show Answer Correct Answer: A) Bring blood to the head. 5. Thin-walled vessels that allow for the exchange of O2, CO2, nutrients and wastes between blood cells or air sacs in the lungs are called A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: C) Capillaries. 6. The circulatory system moves blood around the body through the ..... A) Head. B) Heart. C) Lungs. D) Stomach. Show Answer Correct Answer: B) Heart. 7. What type of blood vessel connects arteries to veins? A) Capillaries. B) Ligaments. C) Nerves. D) Tendons. Show Answer Correct Answer: A) Capillaries. 8. 3 answers are carried by blood, which one is NOT? A) Oxygen. B) Glucose. C) Salt. D) Carbon dioxide. Show Answer Correct Answer: C) Salt. 9. The smallest vessels in the body, where oxygen is exchanged for carbon dioxide, are ..... A) Arteries. B) Veins. C) Capillaries. D) Alveoli. Show Answer Correct Answer: C) Capillaries. 10. What is the function of the heart valves in the circulatory system? A) Pump blood to the lungs. B) Regulate blood flow and prevent backflow. C) Produce red blood cells. D) Filter impurities from the blood. Show Answer Correct Answer: B) Regulate blood flow and prevent backflow. 11. Solid part of the blood that helps blood clot A) Red blood cells. B) White blood cells. C) Platelets. D) Plasma. Show Answer Correct Answer: C) Platelets. 12. Where does the blood enter your heart from (into the right atrium)? A) Your superior and inferior vena cava. B) Your aorta. C) Your tricuspid valve. D) Your mitral valve. Show Answer Correct Answer: A) Your superior and inferior vena cava. 13. Heart disease is the is the number 2 cause of death in America, right behind cancer. A) True. B) False. Show Answer Correct Answer: B) False. 14. What connects veins and arteries? A) Platelets. B) Lymph vessels. C) Capillaries. D) None of above. Show Answer Correct Answer: C) Capillaries. 15. What is the difference between oxygenated and deoxygenated blood? A) Oxygenated blood flows through the veins, while deoxygenated blood flows through the arteries. B) Oxygenated blood is blue, while deoxygenated blood is red. C) Oxygenated blood contains oxygen, while deoxygenated blood does not. D) Oxygenated blood is thicker than deoxygenated blood. Show Answer Correct Answer: C) Oxygenated blood contains oxygen, while deoxygenated blood does not. 16. ..... has thick muscular walls to withstand the pressure of the blood leaving the heart. A) An artery. B) A vein. C) A capillary. D) None of above. Show Answer Correct Answer: A) An artery. 17. Which of the following statements about the heart is NOT true? A) Weighs about 5 pound. B) Approximately the size of a closed fist. C) Beats over 2 billion times in a lifetime. D) Rests on teh diaphragm in the thoracic cavity. Show Answer Correct Answer: A) Weighs about 5 pound. 18. ..... are the thickest blood vessels. A) Arteries. B) Veins. C) Capillaries. D) None of above. Show Answer Correct Answer: A) Arteries. 19. What do you suggest elders in case of edema? What advice do you give to adults when suffering from edema? A) Keep legs in higher position. B) Walk for a while. C) Both. D) Sit in a stagnant position. Show Answer Correct Answer: C) Both. 20. These blood vessels carry back back towards the heart. A) Arteries. B) Capillaries. C) Veins. D) Arterioles. Show Answer Correct Answer: C) Veins. ← 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