Brain ----- veins--- heart---- lungs---- heart----- aorta---- arteries.
The blood contains red blood cells which is responsible for the providing of oxygen to every cell in the body. First the red blood cells takes the blood from brain and all part of the body which contains carbondioxide which is a waste product to the heart through the veins which is a path of carrying deoxygenated blood. After reaching to the heart, the blood send to the lungs for removing carbondioxide and loading oxygen.
This oxygenated blood comes back to the heart through pulmonary artery. When all the blood enters the heart, the heart pumps this blood to aorta which is biggest artery and this aorta sends this oxygenated blood to the arteries in order to provide blood to all parts of the body.
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