Circulation and the heart
the average heart beats about _ times per minute
75
* the tiny white cords that anchor the cusps or flaps of endocardium to the walls of the ventricles are called the
chordae tendineae
when ventricles _, the AV valves are closed
contract
blood nourishing the myocardium with oxygenated blood comes from vessels that branch off the aorta called
coronary arteries
the coronary veins empty blood from the myocardium into a large vein on the posterior side of the heart known as the _
coronary sinus
a recording of the heart's electrical activity is referred to as an _
electrocardiogram
the layer of the heart wall synonymous with the visceral layer of the serous pericardium is _
epicardium
the visceral layer of the serous pericardium is actually the same layer as the
epicardium
what structure divides the left from right ventricle _
inter-ventricular septum
the four pulmonary veins return oxygenated blood to this chamber
left atrium
the pointed apex of the heart is oriented toward the _
left hip
heart chamber with the thickest wall
left ventricle
inferior discharging chamber on the left side of the heart
left ventricle
roof of this chamber contains the bicuspid valve
left ventricle
this chamber sends blood into the aorta
left ventricle
when the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the _
left ventricle to the right atrium
pulmonary circulation involves blood flow to and from the heart and the _
lungs
the heart situated within the medial portion of the thoracic cavity, and indentation known as the
mediastinum
the bicuspid valve is also referred to as the _ valve
mitral
the senatorial node, located in the right atrium of the heart, is often called the _
pacemaker
arteries are normally depicted as red while veins are colored blue. The exceptions to this rule are the _ arteries and veins
pulmonary
the circulation from the heart to the lungs and back is known as _ circulation
pulmonary
Blood leaves the right ventricle through a large artery called the
pulmonary trunk
which one of the following blood vessels carries oxygenated blood _
pulmonary vein
the left atrium receives blood from the lungs via vessels identified as
pulmonary veins
heart chamber that contains the senatorial node
right atrium
the coronary sinus empties blood from cardiac circulation into this chamber
right atrium
the tricuspid valve is located between the _
right atrium and right ventricle
heart chamber that pumps blood to the pulmonary trunk
right ventricle
the partition where the bundle branches are located is called the
septum
deoxygenated blood is returned to the right side of the heart by the _
superior and inferior vena cava
the term that means heart contraction is _
systole
pulmonary veins _
transport oxygenated blood to the heart
the right AV valve is known as the _
tricuspid valve
chest pain resulting from the loss of oxygen to heart cells is called _
angina pectoris
the largest artery in the body is the _
aorta
which valve guards the base of the aorta and opens when the ventricles are contracting _
aortic semilunar valve
the 2 superior receiving chambers of the heart are known as the _, while the 2 inferior discharging chambers of the heart are known as the _.
atria; ventricles
the first heart sound, "lub," caused is caused by the closure of the _ valves
AV
the valves located between the atria and ventricles are known as the _ valves
AV