The circulatory system is made up of the heart, blood, and blood vessels. The different types of blood vessels in the human body: the arteries, capillaries, and veins. The blood vessels are like tubes that branch off into smaller and smaller channels until they arrive at their destination. The circulatory system of our body is an important system that helps transport oxygen and nutrients needed all throughout our bodies. When the most important aspects of our circulatory system is our heart, which serves as a pump. When the right atrium contracts it delivers blood through the tricuspid valve into the right ventricle. The right ventricle pumps blood through the semi lunar valves to the pulmonary artery into the lungs, the blood now is ready to receive a fresh supply of oxygen. The newly oxygenated blood is now ready to enter the left atrium of the heart via the pulmonary vein. Once the oxygenated blood arrives to the left ventricle, the left ventricle will contract, forcing the blood into the aortic artery.
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