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11 Cards in this Set
- Front
- Back
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Direction of blood flow |
pulmonary vein-> left atrium -> mitral valve -> left ventricle -> aortic valve -> aorta -> systemic arteries and the systemic tissues -> vena cava -> right atrium -> tricuspid valve -> right ventricle -> pulmonicvalve -> pulmonary artery -> lungs |
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Stressed volume |
The blood volume contained in the arteries |
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site of highest resistance in the cardiovascular system |
Arterioles |
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receptors found on the arterioles of the skin,splanchnic, and renal circulation |
α1-Adrenergic receptors |
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Receptors in the arterioles of skeletal muscles |
β2-Adrenergic receptors |
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Capillaries -surface area -layers -wall thickness -function |
- largest total cross-sectional and surface area. - single layer of endothelial cells surrounded by basallamina. - thin walled. - site of exchange of nutrients, water, and gases. |
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Venules |
Formed from merged capillaries |
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Arteries -wall thickness -components |
are thick walled, with extensive elastic tissue and smooth muscle.are under high pressure |
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Veins -wall thickness -pressure -blood volume present -receptors present |
-thin walled -under low pressure - blood volume contained in the veins - α1-adrenergic receptors |
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Velocity, blood flow, surface area relationship |
Velocity is directly proportional to blood flow and inversely proportional to the cross-sectional area |
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Resistance: vs viscosity of blood; vs vessel length; vs 4th power to vessel radius |
-Resistance is directly proportional to the viscosity of the blood -Resistance is directly proportional to the length of the vessel.-Resistance is inversely proportional to the fourth power of the vesselradius |
