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15 Cards in this Set
- Front
- Back
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Arteries
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all vessels leaving the heart
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Veins
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all vessels running towards the heart
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Systemic Circulation
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All systemic arteries branch from the aorta
All systemic veins drain into the superior or inferior vena cava or coronary sinus to return to the right-side of the heart |
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Elastic Arteries (aorta and big arteries)
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Help propel blood onward despite ventricular relaxation
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Muscular Arteries (distributing arteries)
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Medium-sized arteries with more muscle than elastic fibers in tunica media
direct blood flow (vasoconstriction and vasodilation to adjust rate of flow); Walls are relatively thick. |
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Arterioles
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resistance vessels that regulate blood flow and blood pressure
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Capillaries
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form Microcirculation; Function is exchange of nutrients & wastes between blood and tissue fluid
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Venules
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Small veins collecting blood from capillaries
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Veins
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thin walls that are adaptable to variations in volume & pressure (blood reservoir)
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venous sinus
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no muscle at all
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Valves
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thin folds of tunica interna designed to prevent backflow
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Venous Return
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Volume of blood flowing back depends on:
Pressure difference Skeletal muscle pump Respiratory pump |
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Journey through the systemic and pulmonary circulation
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start: left atrium
systemic circulation right heart pulmonary circulation back to left atrium |
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Major Arteries of systemic circulation
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Aorta
4 divisions ascending aorta (myocardium) arch of aorta (branches to the arms & head) thoracic aorta (visceral and parietal branches) abdominal aorta |
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Subclavian Branches
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subclavian aa.
axillary artery brachial artery radial and ulnar aa |
