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30 Cards in this Set
- Front
- Back
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Mediastinum
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space btwn. lungs
a mass tissue that extends from the sternum to the lungs |
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Apex
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the pointed edge of the heart which is directed anteriorly, inferiorly and to the left.
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Base
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Posteriorly, inferiorly and to the right
broad portion of the heart opposite of apex |
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The Pericardium
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around the heart
Fibrous pericardium (outer layer) Serous pericardium (inner layer) Parietal (outer) layer of serous pericardium Pericardial cavity Visceral (inner) layer of serous pericardium |
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Fibrous pericardium (outer layer)
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tough, inelastic, dense irr. conn. tissue
resembles a bad that rests on and attaches to the diaphram prevents overstretching of the heart |
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Serous pericardium (inner layer)
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thinner, more delicate membrane that forms a double layer around the heart
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Parietal (outer) layer of serous pericardium
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fused to the fibrous pericardium
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Pericardial cavity
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contains pericardial fluid
btwn. visceral layer and parietal layer |
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Visceral (inner) layer of serous pericardium
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AKA Epicardium
adheres tightly to the surface of heart |
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Heart Wall
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Epicardium
Myocardium Endocardium |
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Epicardium (visceral layer of serous pericardium)
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thin, transparent outer layer of the wall composed of mesothelium and delicate conn. tissue that imparts a smooth slippery texture to the heart
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Myocardium
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cardiac muscle tissue
bulk of heart, responsible for pumping action straited like skeletal involuntary like smooth cardiac muscle fibers swirl diagonally around the heart in interlacing bundles |
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Endocardium
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Also an example of "endothelium"
inner layer of heart wall thin layer of endothelium overlying a thin layer of conn. tissue provides smooth lining for the chambers of heart and cover valves of heart continuous with endothelium lining of the large blood vessel attached to the heart. |
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Heart Chambers
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R. Atrium
L. Atrium R. Ventricle L. Ventricle |
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Right Atrium
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known as "receiving" chambers
Ant. wall has pectinate muscles; posterior wall is smooth Receives deoxygenated blood from 3 vessels - sup. and inf. vena cava; coronary sinus Fovea ovalis R. auricle |
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Fossa Ovalis
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an oval depression, which is remnant of the foramen ovale, an opening in the interatrial septum of the fetal heart that directs blood from the right to left atrium in order to bypass the nonfunctioning fetal lungs.
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L. atrium
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"receiving" chambers
forms most of the base of heart receives blood from lungs through four pulmonary veins smooth post. wall Receives oxygenated blood from pulmonary L. auricle |
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L. auricle
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on top of atrium
ear |
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R. Ventricle
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known as "pumping chambers"
Trabeculae carnae Papillary muscles Chordae tendinae Receives blood from the right atrium and pumps it to the pulmonary artery. |
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Trabeculae carnae
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muscular folds or ridges
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Papillary muscles
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extends from trabeculae
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Chordae tendinae
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attach to bottom valves of heart
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L. Ventricle
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"Pumping" chamber
Wall of ventricle thicker than right Trabeculae Carnae Receives blood from the left atrium and pumps it to the aorta. Papillary muscles Chordae tendinae |
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Interatrial septum
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Btwn. the left and right atrium is a thin partition called the _____.
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Interventricular septum
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The r. ventricle is separated from the L. ventricle by a partition called ______.
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Atrioventricular septum
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The small part of the membranous septum of the heart just above the septal cusp of the tricuspid valve, separating the right atrium from the left ventricle.
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Cardiac Skeleton
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Dense conn. tissue wich forms foundation of heart to which valves attach serves as a point of insertion for cardiac muscle bundles
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Coronary sulcus
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contains coronary sinus
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Anterior interventricular sulcus
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frontal groove btwn. the ventricles
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Posterior interventricular sulcus
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post. surface of heart which marks the boundary btwn. the ventricles on post. aspect of the heart.
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