Summarize the relationship between Cardiac Output, Peripheral Resistance, Blood Volume, and Vessel Elasticity on blood pressure, including the key mechanisms involved.

Here is a summary of the factors affecting blood pressure from the image: Cardiac Output (CO) Effect on Blood Pressure (BP)*: An increase in cardiac output leads to an increase in blood pressure. CO BP Key Explanation/Mechanism*: More blood pumped per minute results in higher pressure against vessel walls. Cardiac output is calculated as Heart Rate × Stroke Volume. Peripheral Resistance (TPR) Effect on Blood Pressure (BP)*: An increase in resistance leads to an increase in blood pressure, and a decrease in resistance leads to a decrease in blood pressure. Resistance BP Resistance BP Key Explanation/Mechanism*: Primarily controlled by arteriole diameter. Vasoconstriction*: Narrows blood vessels, increasing resistance and thus increasing blood pressure. Vasoconstriction Resistance BP Vasodilation*: Widens blood vessels, decreasing resistance and thus decreasing blood pressure. Vasodilation Resistance BP Blood Volume Effect on Blood Pressure (BP)*: An increase in blood volume leads to an increase in blood pressure. Volume BP Key Explanation/Mechanism*: More circulating fluid (e.g., from fluid retention, high salt intake) increases pressure in the vessels. Vessel Elasticity Effect on Blood Pressure (BP)*: A decrease in vessel elasticity leads to an increase in systolic blood pressure, especially. Elasticity Systolic BP (especially) Key Explanation/Mechanism*: Stiff arteries (due to aging or atherosclerosis) have a low ability to stretch, leading to higher peak pressure during systole.