to the heart for re-oxygenation. The heart is the hardest working organ in the cardiovascular system. For components within the human body, see human anatomy.
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The cardiovascular system is responsible for transporting oxygen, nutrients, hormones and cellular waste products throughout the body. How does information travel from the brain to the fingers? The valves open and close to let the blood flow in only one direction, there are 4 valves The two atrioventricular (AV). There are six levels of structural organization that make up the human body and are all associated in various ways. The circulatory and immune systems are two very closely related systems. Capillaries are the smallest and thinnest blood vessels. You May Also Find These Documents Helpful. These system help maintain our health and body in functioning as we grow. These systems work together to maintain your overall health. The digestive and excretory systems help the body with the wonderful task of food.
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