POSTTEST Directions: Choose the letter of the BEST answer. Write your answer in your answer sheet. 1. Which set of organs are the main parts of the circulatory system? A. lungs, heart, kidney C. arteries, veins, capillaries B. mouth, stomach, intestine D. heart, blood vessels, blood 2. What are the pathways where blood travels? A. heart B. lungs C. spinal Cord D. blood vessels 3. Which is NOT a function of the circulatory system? A. distribute oxygen to the body cells B. absorbs food in the small intestines C. collects carbon dioxide as waste materials D. carry food nutrients to be used by the body cells 4. How does blood helps your body? By ... A. making the blood red B. removing all the body waste C. distributing carbon dioxide to the body cells D. carrying nutrients and oxygen to all parts of the body