8. What happens to the pressure in your chest cavity when you inhale? a Air pressure remains the same c. Air pressure is increased b. Air pressure is reduced d. Air pressure changes 9. What organ in the circulatory system is responsible for pumping the blood throughout the body? a. Heart b. Blood vessels c. Blood d. Arteries 10. Which of the following blood vessels is responsible in carrying deoxygenated blood to the heart? a. Arteries b. Veins c. Capillaries d. All of the above 11. What is the main function of the blood in circulatory system? a. Carries the gases, nutrients and other molecules to and from the different parts of the body b. Pumps the blood throughout the body C. Where the exchange of gases and nutrients take place. d Where the carbon dioxide is absorb.​