Heart Structures 1
This is the inner lining of the heart
What is the endocardium
This valve separates the right ventrical from the pulmonary trunk
This is the amount of blood pumped per beat
This is the heart's natural pacemaker
What is the sinoatrial node
This happens to heart rate when blood pressure drops
What is increases
This is the main function of the pericardium?
What is protection and friction reduction
These two structures prevent the AV valves from inverting/prolapse
What are the chordae tendineae and papillary muscles
Heart contraction is called
What is systole
These trigger ventricular contraction
What are Purkinje fibers
This increases stroke volume when BP is low
What is Sympathetic nervous system stimulation
These are the two layers of the serous pericardium?
What are the parietal and visceral layers with fluid between them
This valve separate the left atria from ventricles
What is the mitral or bicuspid or left AV valve
Semilunar valves open during this
What is ventricular systole
This is a fast heart rate +100 beats per minute
What is Tachycardia
Stroke volume may decrease slightly in older adults because of
What is age‑related stiffening of the ventricles reduces how much they can fill during diastole.
This is the other name for the epicardium
What is visceral pericardium
This is the primary reason that the left ventricular wall is thicker than the right ventricular wall
What is the left ventricle generates higher pressure to pump through systemic circulation
These two measurements are needed to calculate cardiac output?
What are heart rate and stroke volume
This happens during sinus arrhythmia
What is slight increase to heart rate during inhalation
Thickening of the heart valves with age can affect cardiac function by
What is cause valves to open less fully, making the heart work harder.
This is the role of the interventricular septum
What is separates ventricles (left and right) prevents blood mixing
This chamber of the heart receives oxygen‑poor blood from the body?
What is the right atrium
Cardiac output does this when heart rate increases
What is increases
This structure carries the electrical impulse from the AV node into the interventricular septum
What is the bundle of His (AV bundle).
Aging affects the sinoatrial node by
What is decrease in number and efficiency