Heart. Structure of the Heart. Divisions of the Heart

Heart. Structure of the Heart. Divisions of the Heart

Circulation and the Heart The next two chapters investigate how the blood delivers oxygen and nutrients to the cells and carries away the waste products of cell metabolism. The continuous oneway circuit of blood through the body in the blood vessels is known as the circulation. The prime mover that propels blood throughout the body is the heart. This page examines the structure and function of the heart to lay the foundation for the detailed discussion of blood vessels that follows. The importance of the heart has been recognized for centuries. Strokes (the contractions) of this pump average about 72 per minute and are carried on unceasingly for the whole of a lifetime. The beating of the heart is affected by the emotions, which may explain the frequent references to it in song and poetry. However, the vital functions of the heart and its disorders are of more practical concern.Location of the HeartThe heart is slightly bigger than a person’s fist. This organ is located between...
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