Abstract
This chapter covers the internal and external anatomy and function of the heart, as well as its positioning within the thorax. Briefly, the heart is a muscular pump, located in the protective thorax, which serves two functions: (1) collect blood from the tissues of the body and pump it to the lungs; and (2) collect blood from the lungs and pump it to all the tissues of the body. The heart’s two upper chambers (or atria) function primarily as collecting chambers, while two lower chambers (ventricles) are much stronger and function to pump blood. The right atrium and ventricle collect blood from the body and pump it to the lungs, and the left atrium and ventricle collect blood from the lungs and pump it throughout the body. There is a one-way flow of blood through the heart which is maintained by a set of four valves (tricuspid, bicuspid, pulmonary, and aortic). The tissues of the heart are supplied with nourishment and oxygen by a separate vascular supply committed only to the heart; the arterial supply to the heart arises from the base of the aorta as the right and left coronary arteries, and the venous drainage is via cardiac veins that return deoxygenated blood to the right atrium.
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© 2009 Humana Press, a part of Springer Science+Business Media, LLC
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Weinhaus, A.J., Roberts, K.P. (2009). Anatomy of the Human Heart. In: Iaizzo, P. (eds) Handbook of Cardiac Anatomy, Physiology, and Devices. Humana Press. https://doi.org/10.1007/978-1-60327-372-5_5
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DOI: https://doi.org/10.1007/978-1-60327-372-5_5
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