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Definition
| anatomical region extending from the sternum to the vertebral column, the first rib and between the lungs |
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Membrane surrounding and protecting the heart
Confines while still allowing free movement
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tough, inelastic, dense irregular connective tissue – prevents overstretching, protection, anchorage
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| thinner, more delicate membrane – double layer (parietal layer fused to fibrous pericardium, visceral layer also called epicardium |
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reduces friction – secreted into pericardial cavity
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Epicardium (external layer)
Myocardium
Endocardium (inner layer)
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Epicardium (external layer)
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Visceral layer of serous pericardium
Smooth, slippery texture to outermost surface
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| 95% of heart is cardiac muscle |
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Endocardium (inner layer)
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| Smooth lining for chambers of heart, valves and continuous with lining of large blood vessels |
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2 atria
2 ventricles
Sulci |
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receiving chambers
*Auricles increase capacity |
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grooves
*Contain coronary blood vessels
*Coronary sulcus
*Anterior interventricular sulcus
*Posterior interventricular sulcus
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