Explain in brief the factors affecting blood pressure.

1. Cardiac Output: A typical cardiac output is 5 liters per minute. Elevated cardiac output correlates with an increase in systolic pressure.

2. Peripheral Resistance: The resistance in peripheral vessels hinges on their diameter. Vasoconstriction induced by vasopressin results in heightened peripheral resistance, leading to an elevation in blood pressure.

3. Blood Volume: Traumatic blood loss diminishes blood volume, causing a subsequent drop in blood pressure.

4. Blood Viscosity: Blood pressure is directly linked to blood viscosity.

5. Age: Blood pressure tends to rise with age due to increased vessel rigidity.

6. Venous Return: Venous return, proportional to blood pressure, signifies the amount of blood returned to the heart through veins per unit time.

7. Blood Vessel Dimensions: Blood pressure correlates with the total length of blood vessels and can be influenced by vasoconstriction or vasodilation.

8. Gender: Before menopause, females generally exhibit slightly lower blood pressure than males of the same age. However, post-menopause, females face an elevated risk of hypertension.

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