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14 Cards in this Set
- Front
- Back
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What are the 3 layers of the heart?
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Epicardium
Myocardium Endocardium |
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What are the 4 chambers of the heart?
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Right Atrium
Left Atrium Right ventricle Left ventricle |
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What are the 4 valves in the heart?
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There are 2 AV valves and the tricuspid and the bicusid
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What are the semilunar valves and where are they?
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The pulmonic semilunar valve lies between the right ventricle and the pulmonary artery
The aortic semilunar valve lies between the left ventricle and the aorta |
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What are the semilunar valves for?
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They prevent blood from flowing back into the ventricles during relaxation, they open during ventricular contraction
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What is the SA node and where is it?
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The main pacemaker in the heart and is located at the junction of the superior vena cava and the right atrium
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What is the AV node and where is it located?
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The AV node receives electrical impulses from the SA node and it is located in the lower aspect of the atrial septum
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What is the first heart sound and when is it heard?
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S1 and it is heard as the
AV valves close and is heard loudest at the apex |
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What is the 2nd heart sound and when is it heard?
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S2 and is heard when the semilunar valves close and is heard loudest at the base of the heart
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What is the normal heart rate?
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60-100 beats per minute
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What does the right coronary artery do?
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It supplies the right atrium and ventricle, the inferior portion of the left ventricle, the posterior septal wall and the SA and AV nodes
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What is the left coronary artery?
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It consists of two major branches, the left anterior descending and the circumflex arteries
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What does the LAD artery do?
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Suuplies blood to the anterior wall of the left ventricle, the anterior ventricular septum, and the apex of the left ventricle
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What does the circumflex artery do?
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Supplies blood to the left atrium and the lateral and posterior surfaces of the left ventricle
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