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.

circulatory system anatomy Vector isolated illustration of human arterial and venous circulatory system in head anatomy. Brain blood vessels diagram. Medical infographics for poster, educational, ...

The nervous system is an organ system that handles communication in the body. There are four types of nerve cells in the nervous system: sensory nerves, motor nerves, autonomic nerves and ...

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