Term
| Purpose of cardiovascular system |
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Definition
Transport O2 and nutrients to tissues
Remove CO2 and wastes from tissues
Regulation of body temperature |
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Term
| How and why blood flow is redistributed |
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Definition
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Term
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Definition
| Exchange site of O2, CO2 and nutrients with tissues |
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Term
| The blood flow through the heart |
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Definition
| Superior/Inferior Vena Cava -> R atrium -> R AV (tricuspid) valve -> R ventricle -> Pulmonary semilunar valve -> R/L pulmonary artery -> Lungs -> R/L pulmonary veins -> L atrium -> L AV (bicuspid) valve -> L ventricle -> Aortic semilunar valve -> Aorta |
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Term
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Definition
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Term
| The blood flow after it leaves heart |
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Definition
Left side pumps oxygenated blood through aorta and to the whole body via arteries
Returns deoxygenated blood to the right side via veins |
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Term
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Definition
Contraction phase
Ejection of blood
2/3 blood is ejected from ventricles per beat |
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Term
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Definition
Relaxation phase
Filling with blood |
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Term
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Definition
| Difference between systolic and diastolic pressure |
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Term
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Definition
Sinoatrial node initiates depolarization
Atrioventricular node passes depolarization to ventricles, brief delay to allow filling
Bundle branches to left and right ventricles
Purkinje fibers throughout ventricles |
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Term
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Definition
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Term
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Definition
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Term
| Parasympathetic effect on outflow of cardiovascular system |
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Definition
Via vagus nerve
Slows HR by inhibiting SA and AV node |
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Term
| Sympathetic effect on outflow of cardiovascular system |
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Definition
Via cardiac accelerator nerves
Increases HR by stimulating SA and AV node |
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Term
Frank-Starling law of the heart
Fick equation |
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Definition
| Greater end diastolic volume results in a more forceful contraction due to stretch of ventricles. Dependent on venous return |
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Term
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Definition
| Average pressure in the arteries MAP |
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Term
Cardiac output
Stroke volume |
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Definition
The amount of blood pumped by the heart each minute.
Q = Heart Rate * Stroke volume |
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Term
| What increases Q during exercise |
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Definition
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Term
| Stroke volume during exercise and effects of training |
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Definition
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Term
| Diastole and systole during rest and exercise |
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Definition
At rest diastole is longer than systole
During exercise both diastole and systole are shorter |
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