Term
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Definition
| the medial cavity of the thorax |
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Term
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Definition
| posterior surface of the heart, directed towards the right shoulder |
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Term
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Definition
-the transport system pump
-the size of a fist
-250 to 350 grams
-flanked by lungs laterally, sternum anteriorly, vertebral column posteriorally, rests on diaphragm
-between the 2nd rib to the 5th intercostal space |
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Term
| point of maximal intensity |
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Definition
| space between the 5th and 6th rib where you can feel the apex contracts |
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Term
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Definition
| double-walled sac enclosing the heart |
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Term
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Definition
-loosely fitting part of the sac
-made of tough, dense connectiv tissue
-protects the heart
-anchors it to surrounding structures
-prevents overfilling of the heart w/ blood |
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Term
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Definition
-deep to the fibrous pericardium
-thin, slippery two layer serous membrane |
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Term
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Definition
-lines the internal surface of the fibrous pericadium
-superior margin of the heart, attaches to large arteries exiting the heart& continues to external heart surface |
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Term
| visceral layer/epicardium |
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Definition
| external surface of the heart |
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Term
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Definition
| b/w the parietal and visceral layers, slitlike cavity which contains a film of serous fluid to lubricate heart during beating |
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Term
pathway of blood through the heart |
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Definition
pulmonary circulation
-o2 poor, co2 rich blood returns from body
-enters right atrium to right ventricle
-rt. v pumps to lungs via pulmonary trunk -blood unloads co2/picks up o2 in lungs -o2 blood carried up by pulmonary veins systemic circulation -back to left atrium, into left ventricle -pumped into aorta -transported via smaller systemic arteries to body tissues -gases & nutrients exhanged across capillary walls -blood now co2 rich/o2 poor goes thru systemic veins -enters right side of heart through venae cavae |
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Term
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Definition
-functional blood supply of the heart, shortest circulation in the body -the arterial supply of the heart is provided by the right and left coronary arteries, arising from the aorta -left coronary artery runs to the left side of the heart divides into: the anterior interventricular artery (supplies blood to the interventricular sulcus, septum and anterior walls of the ventricles; and the circumflex artery: |
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