Vein - A blood vessel that carries blood to your heart, Artery - A blood vessel that carries blood away from the heart., Capillary - The smallest type of blood vessel, Ventricle - A muscular chamber that pumps blood out of the heart and into the circulatory system, Atrium - An upper chamber of the heart that receives blood before passing it onto the ventricle., Vena cava - A large vein that carries blood to the heart from other areas of the body, Aorta - The largest artery in the body. It carries oxygen-rich blood away from the heart to the rest of the body, Septum - A dividing wall that separates two chambers, such as that between the left and right sides of the heart., Pulmonary vein - A blood vessel that carries oxygen-rich blood from your lungs to your heart., Valves - A structure that prevents the backward flow of blood. Found in veins and in the heart.,

Circulatory System

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