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CV_System_Figs_BW

CV_System_Figs_BW - Anatomy of Cardiovascular System 0...

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Anatomy of Cardiovascular System 0 Arteries Arterioles Capillaries Venules Veins HEART Ventricle Atrium
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Pressure, Flow, and Resistance Fluids flow down pressure gradients Higher P Lower P FLOW P 1 FLOW RATE (volume / time) ΔP P 2 Q ΔP = P 1 - P 2 Flow rate (Q) is proportional to the pressure gradient Flow rate (Q) is inversely proportional to resistance Q 1 / R
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Determinants of Vessel Resistance Poiseuille’s Law : R = 8 L η / π r4 or, R L η / r4 Q L r [ η (eta) Viscosity of blood ] R 1 Q 1 R 1/16 Q 16 If Q ΔP, and Q 1 / R, then Q ΔP / R like I = ΔV / R
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Mean Arterial Pressure (MAP) MAP is the primary driving force for blood flow MAP Cardiac Output (1) × Peripheral Resistance (2) (1) Volume of blood pumped per minute (L/min) (2) Total R of all vessels to blood flow
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Functional Anatomy of the Heart - 1
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Functional Anatomy of the Heart - 2
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Functional Anatomy of the Heart - 3
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Functional Anatomy of the Heart - 4
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Cardiac Muscle Cells Contains desmosomes and gap junctions
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Excitation-Contraction Coupling & Relaxation
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