<Tr> <Th_colspan="2"> Circulatory system </Th> </Tr> <Tr> <Td_colspan="2"> The human circulatory system (simplified). Red indicates oxygenated blood carried in arteries, blue indicates deoxygenated blood carried in veins . Capillaries, which join the arteries and veins, and the lymphatic vessels are not shown . </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Th> MeSH </Th> <Td> D002319 </Td> </Tr>

What are the parts of the body use for circulation