Twenty major arteries make a path through your tissues, where they branch into smaller vessels called arterioles. Arterioles further branch into capillaries, the true deliverers of oxygen and nutrients to your cells.
Most capillaries are thinner than a hair. In fact, many are so tiny only one blood cell can move through them at a time. Once the capillaries deliver oxygen and nutrients and pick up carbon dioxide and other waste, they move the blood back through wider vessels called venules. Venules eventually join to form veins, which deliver the blood back to your heart to pick up oxygen. Visit U. Here are some examples related to the Integumentary System. Cardiovascular System. Cardiovascular System - Self Test questions.
WebAnatomy, University of Minnesota Test your anatomy knowledge with these interactive questions. Includes different question types and answers. Human Anatomy - Heart circulatory system. The Circulatory System. Paul Andersen Paul Andersen surveys the circulatory system in humans. It consists of the heart , which is a muscular pumping device, and a closed system of vessels called arteries , veins , and capillaries.
As the name implies, blood contained in the circulatory system is pumped by the heart around a closed circle or circuit of vessels as it passes again and again through the various "circulations" of the body.
As in the adult, survival of the developing embryo depends on the circulation of blood to maintain homeostasis and a favorable cellular environment.
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