Ch 12: Online 3 Flashcards
Heart
Prevents friction between pericardial layers
Serous fluid
Electrically insulates the ventricles from the atria
Fibrous skeleton
Contraction of chambers of the heart
Systole
Relaxation of chambers of the heart
Diastole
Lack of blood in a body part
Ischemia
Narrowing of a blood vessel
Stenosis
Very rapid and uncoordinated heartbeats
Fibrillation
The extra volume the heart can pump when necessary
Cardiac reserve
Fibrous strings to the Artioventricular (AV) valve flaps
Chordae tendineae
The more the ventricles are stretched, the more forcefully they contract.
Starlings law
The vessels of the myocardium
Coronary
The sequence of events in one heartbeat
Cardiac cycle
The volume of blood pumped by a ventricle per heartbeat
Stroke volume
Heart rate
Pulse
Myocardium that anchors the Atrioventricular (AV) valve flaps
Papillary Muscles
The outermost membrane around the heart
Fibrous pericardium
The lining of the chambers of the heart
Endocardium
Death of part of the cardiac muscle
Myocardial infarction
More rapid heart rate
Tachycardia
Slower heart rate
Bradycardia
The volume of blood pumped by a ventricle in one minute
Cardiac output
A recording of the electrical changes that accompany the cardiac cycle
Electrocardiogram (ECG)
A peptide produced by the atria that increases sodium excretion
Atrial natriuretic
Pulmonary and aortic
Semilunar valves
