The Circulatory System and Fluid Dynamics Essay

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1. Conductive arteries – Conductive arteries are the most proximal compartment of the coronary arterial system. Their diameter is generally ranging from 500 μm up to 2-5 mm. These are large epicardial coronary arteries that work as a capacitance function for the blood flow. They have very low resistance to blood flow and therefore, the pressure drop along the length of conductive arteries is negligible. The conductive arteries have an inbuilt characteristic of maintaining the shear stress by changing epicardial dilatation. This characteristic is called being responsive to flow-dependent dilatation. They are not very responsive to intravascular pressure or metabolites. [1] Prearterioles – Prearterioles are the intermediate compartment to…show more content…
1. Conductive arteries – Conductive arteries are the most proximal compartment of the coronary arterial system. Their diameter is generally ranging from 500 μm up to 2-5 mm. These are large epicardial coronary arteries that work as a capacitance function for the blood flow. They have very low resistance to blood flow and therefore, the pressure drop along the length of conductive arteries is negligible. The conductive arteries have an inbuilt characteristic of maintaining the shear stress by changing epicardial dilatation. This characteristic is called being responsive to flow-dependent dilatation. They are not very responsive to intravascular pressure or metabolites. [1] Prearterioles – Prearterioles are the intermediate compartment to conductive arteries. Their diameter ranges from 100-500 μm approximately. The drop in pressure across the prearterioles is large. They have thick walls and extra-myocardial position due to which they do not come across metabolites and hence do not respond to them. The prearterioles are more responsive to flow-dependent dilation than the conductive arteries. [1] Arterioles - Arterioles are the most distal compartment of the coronary arterial system with diameters of less than 100 μm. The drop in pressure along the arterioles is considerable and maximum of all the three compartments of coronary arterial system. They are also the most responsive to flow-dependent dilatation during epicardial changes due to varying blood flow. They are

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