system and is responsible for pumping muscle and there are 3 blood vessels that work with the heart to transport blood around the body. and The These are are responsible for carrying blood away from the heart. The carry blood to the heart while the The heart is part of the The Heart one responsible for swapping gasses. Our muscles take in give out called Circulatory around the body. It is described as an Atriums Oxygen The swapping of these gases always takes place in the are breathed in and out by the top colled Ventricles blood as energy and as waste. If a blood vessel is high in Oxygen, it is blood. If the blood is rich in Carbon Dioxide, it is called Blood and both gases The heart also has 4 chambers. Two on the and two on the bottom called Involuntary G Capillaries C Veins q 1 Lungs Arteries Carbon Dioxide Deoxygenated Oxygenated​