Unit 3-Lecture 1.pptx - Unit 3-The Heart Lecture 1-Anatomy...

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Unit 3-The Heart Lecture 1-Anatomy of the Heart
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Heart Anatomy Approximately the size of your fist Location Superior surface of diaphragm Left of the midline Anterior to the vertebral column, posterior to the sternum
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Heart Anatomy Figure 18.1
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Coverings of the Heart: Anatomy Pericardium – a double-walled sac around the heart composed of: A superficial fibrous pericardium A deep two-layer serous pericardium The parietal layer lines the internal surface of the fibrous pericardium The visceral layer or epicardium lines the surface of the heart They are separated by the fluid-filled pericardial cavity
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Coverings of the Heart: Physiology The pericardium: Protects and anchors the heart Prevents overfilling of the heart with blood Allows for the heart to work in a relatively friction- free environment
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Pericardial Layers of the Heart Figure 18.2
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Heart Wall Epicardium – visceral layer of the serous pericardium
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