haney apch14
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| How is the heart positioned? | The heart is positioned obliquely between the lungs in the mediastinum.
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| How much bulk likes to the left side of the midline of the body? | two thirds
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| What is the bulk shaped like? | a Blunt cone
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| What is another name for the pericardial sac? | parietal pericardium
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| What is the outer most layer of the pericardial sac? | fibrous pericardium
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| What is the fibrous pericardium made of? | Though fibrous connective tissue and connects to the large blood vessels that enter and leave the heart.
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| What does the fibrous pericardium prevent? | overdistention of the pumping heart by acting as a tough protective membrane.
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| What is the inner most layer of the pericardial sac? | serous pericardium
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| Is the layer thin? | yes
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| What does the serous pericardium continue? | the outermost layer of the wall of the heart called the epicardium at the base of the heart.
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| What is the outermost layer of the wall of the heart called? | epicardium or visceral pericardium
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| Is the epicardium thin? | yes
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| Is the epicardium transparent? | yes
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| what is the space in between the epicardium and the serous pericardium called? | the pericardial cavity
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| What is the fluid called in the pericardial carity? | pericardial fluid
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| what does the pericardial fluid prevent? | friction and erosion of the tissue between the membranes
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| What is the second layer of the wall of the heart? | myocardium
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| Where is the layer located? | layer of cardiac muscle tissue
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| Are the cells or fibers in the myocardium involuntary? | yes
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| What is the myocradium layer responsible for? | contractions of the heart
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| What is the thrid layer of the wall of the heart called? | endocardium
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| What is the endocardium a thin layer of? | the endothelium
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| What is the name of the two sides of the heart? | the right atrium and left atruim
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| What is the external appendage called? | auricle
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| How did auricle get its name? | because of its similarity to the ear of a dog.
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| What does the auricle do? | it increases the bolume of the atrium
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| Is he liking of the atrium smooth? | yes except for the anterior atrial walls and the lining of thhe two auricles.
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| What are the two atria separated by? | an internal interatrial septum
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| What is the projecting muscle bundle called? | musculi perctinati
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| What is the left and right ventrical separated by? | an internal interventricular septum
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| What are the irregular rides and folds of the myocardium of the ventricles called? | trabeculae
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