Respuesta :

The collective term for various diseases of the heart and blood vessels is cardiovascular disease.

Heart is the main organ of the circulatory system which pumps blood to the whole body. The heart is made up of cardiac muscles that can maintain its contraction and relaxation on its own. There are 4 chambers of the heart: two upper atrium and two lower ventricles.  

Blood vessels are the hollow tube like structures that mediate the flow of blood to the whole body. There are three varieties of blood vessels in the human body. These are: arteries, veins and capillaries. Arteries carry blood away from the heart, veins carry blood to the heart and capillaries mediate the exchange of blood at the target site.

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