A. Overview Major factors influencing blood pressure Arterial blood pressure tone Blood Heart ContractilityFilling volume rate pressure Venous tone Baroreceptors and sympathetic nervous system Renin-angiotention-aldosterol system (RAAS)Major factors influencing blood pressure Arterial blood pressure Cardiac output Peripheral resistance   Venous tone Blood volume Filling pressure Heart Contractility rate arteriolar tone Baroreceptors and sympathetic nervous system Renin-angiotention-aldosterol system (RAAS) A. Overview