ES 207 Lecture : Chapter 12 Heart.docx
8 Apr 2014
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Document Summary
Cardiovascular system: the heart, blood vessels, and the blood. Circulatory system: consists of the pulmonary and systematic circulations. 12. 2 size, form, and location of the heart. Adult heart: shaped like a blunt cone: approximately the size of a closed fist, larger in physically active adults, generally decreases in size after 65 years of age. Apex: blunt, rounded point of the heart: directly anteriorly and slightly inferiorly, directed to the left of the heart"s mass lies to the left of the midline of the mediastinum. Base: larger, flat part of the opposite end of the heart: directed posteriorly and slightly superior, located deep to the sternum, extends to the level of the 2nd intercostal space. Location of heart : thoracic cavity between 2 pleural cavities that surround the lungs, lies obliquely in the mediastinum. Mediastinum: middle wall of the thorax, consisting of the trachea, esophagus, thymus, heart, and other structures.
