Heart Function

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Pulmonary circulation
Blood circulates from the heart to the lungs and returns to the heart
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Systemic circulation
Blood circulates from the heart to the body tissues and returns to the heart
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Sino-Atrial Node (SAN)
Small mass of cardiac muscle, found in the wall of the right atrium that generates the heartbeat
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Intrinsic
This name given to the idea that the heart generates its own contraction from within itself
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Myogenic
Impulses generated without nervous stimulation
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Atrio-ventricular node
Bundle of tissue found in atrio-ventricular septum that forms part of the heart's conduction system
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Bundle of His
Specialised bundles of nerve tissue, found in the the interventricular septum that forms part of the conduction system
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Purkinje fibres
Specialised nerve fibres found in the ventricles
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Stroke volume
Volume of blood leaving the left ventricle per beat
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Ejection fraction
The proportion of blood in the left ventricle pumped out each beat
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Cardiac output
Volume of blood leaving the left ventricle per minute (stroke volume x heart beat)
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Starling's Law of the Heart
The greater the venous return the greater the strength of contraction
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Venous return
The mechanism that return blood to the heart
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Chemoreceptors
Group of cells sensitive to changes in blood acidity
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Hypertrophy or Athlete's Heart
The increase in size of the heart that accompanies training
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Bradycardia
The reduction in resting heart rate that accompanies training
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Cardiovascular drift
An increase in heart rate that occurs during prolonged exercise that compensates for the decrease in stroke volume in an attempt to maintain cardiac output
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Other cards in this set

Card 2

Front

Blood circulates from the heart to the body tissues and returns to the heart

Back

Systemic circulation

Card 3

Front

Small mass of cardiac muscle, found in the wall of the right atrium that generates the heartbeat

Back

Preview of the back of card 3

Card 4

Front

This name given to the idea that the heart generates its own contraction from within itself

Back

Preview of the back of card 4

Card 5

Front

Impulses generated without nervous stimulation

Back

Preview of the back of card 5
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