The circulatory system is the body
transport system. It is made of a group of organs that transport blood
throughout body. The heart pumps the blood and the arteries and the veins
transport it. Oxygen-rich blood leaves the left side of the heart and then
enters the biggest artery, called the aorta. The aorta branches go to the
smaller arteries, which then branch into smaller vessels that travel to whole
of our body. When blood enter the smaller blood which is vessels, which are
called capillaries and are found in body tissue it gives nutrients and oxygen
to the cells and takes in carbon dioxide, water and, waste. The blood, which no
longer contains oxygen and nutrients, then goes back to the heart through
veins
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