lec_11,12,13_cardiovasc

lec_11,12,13_cardiovasc - The cardiovascular system Cardio...

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The cardiovascular system Cardio -the heart Vascular- the circulation Functions: Delivering oxygen and fuels to tissues Removing metabolic waste products It helps maintain pH Temperature regulation Delivers hormones
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Function during exercise: Metabolic demand for O 2 greater, metabolic waste products increase, cellular pH decreases, temperature increases. Cardiovascular response: increase blood flow to tissues redistribute blood flow
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Overview of the cardiovascular system: You should know: Right and left Ventricles Right and left atria Aorta Inferior and superior Vena Cava Pulmonary artery and pulmonary vein Direction of blood flow
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Questions Which has more blood at an given time, Pulmonary or Systemic circuit? Which circuit has highest pressure? Which circuit has the higher blood flow? Arteries (in general) carry oxygenated blood. Veins-deoxygenated. Which artery is an exception?
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Structure of heart: Tissue Pericardium Myocardium Endocardium Myocardium Inherent rhythmicity (autorythmic) SA node Conductive Functional Syncytium Conductive system:  SA node AV node Bundle of HIS
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ANATOMY 4 Chambers separated by Septa Atria – thin walled. Serve as reservoirs for the Ventricles Ventricles – thick walled (more muscular), but R. and L. differ greatly in size. Chambers separated by 1-way valves: Semilunar valves: Aortic Valve Pulmonary valve Atrioventricular valves: Tricuspid valve: Mitral
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How are electrical signals (that signal the myocardium to contract) propagated from the SA node through the conductive system? Resting heart muscle cells are polarized – negatively charged on inside, positive on outside. This
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This note was uploaded on 04/13/2008 for the course ABIO 365 taught by Professor Brutsaert during the Spring '08 term at SUNY Albany.

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lec_11,12,13_cardiovasc - The cardiovascular system Cardio...

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