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haney apch14

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