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The heart is located between the lungs in an area known as what? |
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Mediastinum |
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What arrangement of cardiac muscle fibers makes a heart efficient? |
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arranged spirally around the heart |
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What is the innermost layer of the heart wall called? |
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endocardium |
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Which cell type makes up most of the myocardium? |
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cardiac muscle |
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Is the apex of the heart superior or inferior to the rest of the heart? |
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inferior |
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What is the name of the depression on the anterior surface of the heart that is between the two ventricles? |
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intraventricular sulcus |
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Are the auricles extensions of the atria or the ventricles? |
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atria |
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What separates the left atrium from the right atrium? |
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intratrial septum |
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What is the name of the thin spot between atria? |
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fossa ovalis |
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The bicuspid valve is located between what two chambers of the heart? |
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between the left atrium and left ventricle |
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Name the structure between the left atrioventricular valve and papillary muscle. |
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Chordae tendinea (tendinous chords) |
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What adaptation do you see with the walls of the left ventricle being thicker than those of the right ventricle? |
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thicker to pump back to the rest of the body |
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What is the function of the aortic valve? |
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prevents back flow from the aorta into the left ventricle |
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What is another name for the tricuspid valve? |
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right atrioventricular valve |
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What three vessels take blood to the right atrium? |
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superior vena cava, inferior vena cava, coronary sinus |
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The great cardiac vein and the middle cardiac vein lead to what vessel? |
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right atrium |
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What blood vessels nourish the heart tissue? |
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coronary arteries |
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The sinoatrial node has a common name. What is it? |
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pacemaker |
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After the AV node depolarizes, what structures conduct the impulse to the myocardium of the ventricles? |
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atrioventricular bundle --> right and left bundle branches --> purkinje (conduction) fibers |
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