The Heart

the heart
blood within the pulmonary beins returns to the
blood is carried to capillaries in the myocardium by way of
coronary arteries
The myocardium is the layer of the heart that actually contracts
the structure of the heart wall
the action potential seen in cardiac muscle differs from the action potential of skeletal muscle by
there is a plateau
blood flows passively from the atria to the ventricles through open AV valves when?
during the period of ventricular filling
Gap junctions that allow the cells to contract in a synchronized manner
cardiac muscle has
The av valves are supporeted by chordae tendinae so that they do not blow back up into the atria during ventricular contraction
heart valves
which of the following is not part of the conduction system of the heart
av valve
Noticing the thickness of the ventricle walls helps to
define the left and right side
when the ventricle is in systole
the tricuspid valve is closed
which vessel of the heart receives blood during right ventricular systole
pulmonary trunk
blood enters which of these vessels during ventricular systole
aorta and pulmonary trunk
connects the two atria in the fetal heart
foramen ovale
region in the abdominal cavity
pericardial cavity
small muscle masses attached to the chordae tendineae are the
papillary muscles
the left ventricular wall of the heart is thicker than the right wall in order to
pump blood with greater pressure
the p wave of a normal electrocardiogram indicates
atrial depolarization
the lining of the heart
the outermost layer of serous pericardium
parietal layer
the pacemaker of the heart
SA node
prevents backflow into the ventricles
pulmonary semilunar valves
prevents backflow into the left atrium
mitral valve
prevents backflow into the right atrium
tricuspid valve
prevents backflow into the left ventricle
aortic semilunar valve
network found in the ventricular myocardium
purkinje fibers
heart muscle
serous layer covering the heart muscle