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48 Cards in this Set

  • Front
  • Back
which portion of the mediastinum is the heart located in?
the middle portion
which direction does the apex of the heart point in?
anteriorly and to the left
what is on the anterior (sternocostal) surface ot the heart?
the right ventricle
what is on the posterior surface or the base of the heart?
the left atrium, and the part of the right atrium that receives the vena cava
what is on the right (pulmonary) surface of the heart?
right atrium
what is on the left (pulmonary) sruface of the heart
the left ventricle and left auricle
what is on the inferior (diaphragmatic) surface of the heart?
the right and left ventricles
what composes the left edge of the heart?
the left ventricle, left, auricle, aortic arch, and pulmonary trunk
what composes the right border of the heart?
the superior vena cava, inferior vena cava, and right atrium
what composes the inferior border of the heart?
the right ventricle and apex of left ventricle
what's in the apex of the heart?
ONLY the left ventricle
what separates the atria?
the interatrial septum
what separates the ventricles?
the interventricular septum
where does the right atrium receive blood from?
the superior vena cava, inferior vena cava, and coronary sinus
what is the crista terminalis?
in the right atrium, it's the ridge that separates the smooth part of the atrium from the rough part
what are the pectinate muscles?
in the atria, comb-like muscular ridges, come from the primitive atrium
what is the fossa ovalis?
a circular depression on the interatrial septum; it's a remnant of the foramen ovale
what valve separates the right atrium and ventricle?
the tricuspid valve
what are the trabeculae carneae
muscular bundles on the walls of the left and right ventricles
what do the papillary muscles do?
attach to both atrioventricular valves via the cordae tendineae; tey hold the valves closed while the ventricle contracts
what is the septomarginal trabecula
aka the moderator band; it's a muscular band in the right atrium that contains connective tissue; it also connects the interventricular septum, the anterior papillary muscle, and anterior wall of the right ventricle
what is the conus arteriosus?
a smooth outflow tract of the right ventricle that leads to the pulmonary valve
how many cusps are in the pulmonary valve?
what veins empty into the left atrium?
the four pulmonary veins
what valve is between the left atrium and the left ventricle?
the mitral valve
how many cusps does the mitral valve have?
what valve lies between the left ventricle and the aorta?
the aortic or semilunar valve
which heart valve does not have three cusps?
the mitral valve
which cells initiate the depolarization of the heart?
the SA node cells
where is the SA node?
between the right atrium and superior vena cava
what does the AV node do?
receives the signal from the atria
where is the AV node located?
in the interatrial septum near the coronary sinus opening and tricuspid valve
what does the AV bundle do?
transmits the signal from the AV node to the ventricles
where is pectinate muscle located in the left atrium
in the auricle
what are the bundle branches?
branches from the AV bundle that appear at the junction of the membranous and muscular parts of the septum; onduct impulse along the septal muscle - right branch leaves via moderator band
that are the purkinje fibers?
terminal branches of the bundle branches; form plexuses in the ventricular wall
what artery supplies the SA and AV nodes?
the right coronary artery
what supplies the AV bundle and its branches?
the left coronary artery (anterior interventricular)
what provides the sympathetic innervation to the heart?
the cardiac nerves
what provides parasympathetic innervation to the heart?
the cardiac branches of the vagus nerves
where do sympathetic nerves to the heart originate?
where is pain from the heart often referred to?
the skin of the chest and left arm
what chamber is papillary muscle found in?
the left and right ventricles
what chamber is the fossa ovalis found in?
the right atrium
what chamber is the conus arteriosus found in?
the right ventricle
what chamber are the pectinate muscles found in?
the right atrium, and left and right auricles
where is the crista terminalis found?
the right atrium
where are the trabeculae carneae found?
the left and right ventricles