Flashcards in CV System: The Heart Deck (34):
The heart beats ______ times every day
The heart is located in the ________.
What is the pericardium?
Membrane that surrounds the heart
The outer layer of the pericardium that is composed of tough, inelastic, dense irregular connective tissue is the _________.
The thinner, more delicate layer of the pericardium is the _________.
What are the two layers of the serous pericardium?
_________ lies in between the parietal layer and visceral layer in the __________ cavity.
What are the layers of the heart wall?
What are the chambers of the heart?
The right atrium receives _________ blood from three veins:_______, ________, and _______
superior vena cava
inferior vena cava
The right ventricle pumps blood through the _______ into the ________
The left atrium receives blood from the (organ) ________ through the _________.
The right atrium and right ventricle are connected by the _________.
The left atrium and left ventricle are connected by the _________.
bicuspid valve (mitral valve)
Pulmonary veins supply _________ blood to the heart
Which ventricle has a thicker wall? Why?
Left ventricle, pumps blood a greater distance than the right at higher pressures
What are the semilunar valves?
Stenosis is a failure of the heart valve to _____
Insufficiency is failure of a valve to _____.
The coronary arteries branch from the _______.
What is the coronary sinus?
a large bascular sinus on the posterior surface of the heart
_________ are larger and more numerous in cardiac muscle fiber
_______ allow for propagation of action potentials across branched cardiac muscle fibers
What is the pacemaker of the heart?
Sinoatrial (SA) node
What is the atrioventricular (AV) node?
site where action potentials are conducted from the atria to the ventricles
Autorhythmic fibers are ________
self-excitable cardiac muscle fibers that maintain the heart's continuous beating
Systole is ________
the phase of contraction
Diastole is _________
the phase of relaxation
Heart Sounds: S1 is described as the _____ sound, and is caused by closure of the _____ valves after ventricular ______ begins.
Heart Sounds: S2 is described as the _____ sound, and is caused by closure of the _____ valves after ventricular ______ begins.
CHF can lead to pulmonary edema when the ____ ventricle fails
CHF can lead to peripheral edema when the _____ ventricle fails
elevated resting heart rate