In human beings the transport of material takes place by a fluid medium. The blood circulates throughout the body by circulatory system and keep each body cell into a living state.
The circulatory system in human beings consists of heart and blood vessels. Arteries, veins and capillaries are the types of blood vessels.
Arteries-
The arteries are widest of all blood vessels and the pure blood from heart to elsewhere.
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Veins-
Veins are the blood vessels which carry the impure blood to the heart.
Capillaries-
Minute vessles that connect arteries with veines.
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Heart-The heart is a pumping organ that circulates the throughout the body via blood vessels. The heart consists of chambers- the right and left auricles and right and left ventricles. The right side of the heart is responsible for pumping the blood