Circulatory system: Blood vessels Laid end-to-end, an adult's arteries, veins and capillaries would stretch for about 100,000 miles - enough to wrap around the world nearly four times.

The study, published Feb. 25 in Nature Communications, challenges the conventional belief that a type of fat called ceramides accumulates in blood vessels causing inflammation ... conditions that ...

Blood vessels leading into and out of the heart There are four main blood vessels that take blood into and out of the heart. The aorta is the largest artery in the body. It carries oxygenated ...