This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 26 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 26 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Arterioles branch into tiny ....., blood vessels that deliver supplies to individual cells and take away waste materials. A) Capillaries. B) Arteries. C) Veins. D) Venules. Show Answer Correct Answer: A) Capillaries. 2. Where are the alveoli located in the respiratory system? A) Outside the larynx. B) Inside the lungs. C) In the trachea. D) Inside the mouth. Show Answer Correct Answer: B) Inside the lungs. 3. What is the site of gas exchange? A) Alveoli. B) Nose. C) Lung. D) Bronchi. Show Answer Correct Answer: A) Alveoli. 4. Arteries are..... than veins. A) Thicker and stronger. B) Smaller and weaker. C) Thicker and weaker. D) Smaller and stronger. Show Answer Correct Answer: A) Thicker and stronger. 5. What "waste" product do RBC pick up from cells? A) Oxygen. B) Carbon Dioxide. C) Yes. D) Helium. Show Answer Correct Answer: B) Carbon Dioxide. 6. The upper chambers of the heart that receive blood entering the heart. A) Septum. B) Atrium. C) Ventricles. D) Valves. Show Answer Correct Answer: B) Atrium. 7. What is the purpose of a valve? A) To move blood away from the heart. B) The move blood downward through the body. C) To prevent back flow of blood. D) To guide the blood through the bones. Show Answer Correct Answer: C) To prevent back flow of blood. 8. The name of proteins on the surface of red blood cells A) Antibodies. B) Plasma. C) Antigens. D) Collagen. Show Answer Correct Answer: C) Antigens. 9. Carries messages to and from the brain. Nerve tissue is composed of special cell known as '' Neurons" A) Connective tissue. B) Nerve tissue. C) Epithelial Tissue. D) Liquid tissue. Show Answer Correct Answer: B) Nerve tissue. 10. What shape are red blood cells? A) Spherical. B) Biconcave. C) Concave-convex. D) Irregular. Show Answer Correct Answer: B) Biconcave. 11. Heart beats in a rhythmic manner for about ..... A) Hatmes/from. B) 62times/min. C) Hatems/from. D) None. Show Answer Correct Answer: A) Hatmes/from. 12. Which is the largest vein in the body? A) Aorta. B) Arteriole. C) Vena Cava. D) Pulmonary Vein. Show Answer Correct Answer: C) Vena Cava. 13. Which component of blood is liquid? A) Plasma. B) RBC. C) WBC. D) Platelets. Show Answer Correct Answer: A) Plasma. 14. What is the correct path through the circulatory system which describes the passage of blood originating in the left leg? A) Vena cava-left atrium-right atrium-lungs-left ventricle-right ventricle-aorta. B) Vena cava-right atrium-left atrium-lungs-right ventricle-left ventricle-aorta. C) Vena cava-right atrium-right ventricle-lungs-left atrium-left ventricle-aorta. D) Vena cava-left atrium-left ventricle-lungs-right atrium-right ventricle-aorta. Show Answer Correct Answer: C) Vena cava-right atrium-right ventricle-lungs-left atrium-left ventricle-aorta. 15. Which part of the blood helps blood clots? A) Red blood cells. B) Platelets. C) Plasma. D) White blood cells. Show Answer Correct Answer: B) Platelets. 16. What is responsible for the red color of blood? A) Red blood cells. B) Plasma. C) White blood cells. D) Veins. Show Answer Correct Answer: A) Red blood cells. 17. What is at the center of each heme ring? A) Potassium. B) Calcium. C) Iron. D) Sodium. Show Answer Correct Answer: C) Iron. 18. Which component of blood is responsible for fighting and destroying pathogens? A) Red Blood Cells. B) White Blood Cells. C) Platelets. D) Plasma. Show Answer Correct Answer: B) White Blood Cells. 19. ..... in the human body filters the bacteria and cell debris. A) Lymph nodes. B) Lymph vessels. C) Blood. D) Antibodies. Show Answer Correct Answer: A) Lymph nodes. 20. What are the main organs in the Respiratory System? A) Windpipe. B) Nose. C) Mouth. D) Lungs. Show Answer Correct Answer: D) Lungs. ← 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