Explain peripheral resistance nd venous return nd how it affects the bp
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Increases in peripheral resistance, blood volume, and cardiac output result in higher blood pressure. Conversely decreases in any of these factors lead to lower blood pressure. Three main sources of peripheral resistance: Blood vessel diameter, blood viscosity, and total vessel length.
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When considering venous return, the pressure gradient is mean systemic pressure minus the right atrial pressure, and resistance is the total peripheral vascular resistance. ... Reducing blood volume below the unstressed vascular volume does not result in further reduction in mean systemic pressure.
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