aorta - It is the largest artery in the body. It connects directly to the heart, artery - It is a blood vessel that carries blood away from the heart., atrium - It is one of the two upper chambers of the heart, which receive blood from veins., capillary - is the smallest kind of blood vessel in the body, where the exchange of oxygen, water, and nutrients takes place., circulatory system - It is the system responsible for carrying blood and oxygen throughout the body., heart - It is the organ which pumps blood throughout the body., pulmonary - If something is ... , it has to do with the lungs, such as the pulmonary artery., valve - It is a flap in a bodily system that allows passage of material in one direction but prevents passage in the other direction., vein - It is a blood vessel that carries blood towards the heart., vena cava - It I is one of the two largest veins in the body. It connects directly to the heart.,

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