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Pressure Reservoirs

Arteries that maintain and regulate blood pressure within the cardiovascular system.

Blood Reservoirs

Veins that hold a large portion of the body's blood supply, playing a crucial role in blood volume and pressure regulation.

Elasticity of Arteries

The ability of arterial walls to expand and contract, storing energy during ventricular contraction.

Diastolic Pressure Maintenance

The release of stored energy in arteries during heart relaxation to maintain blood pressure.

Smooth Blood Flow

The continuous and smooth flow of blood ensured by the elasticity of arteries, important for nutrient delivery.

Blood Distribution Control

The ability of muscular arteries to constrict or dilate, regulating blood flow to specific organs.

Vein Structure

Thinner and less elastic walls of veins that allow them to accommodate a larger volume of blood at lower pressure.

Reserve Supply Function

The ability of veins to act as a reserve for blood, pushing more blood into circulation when needed.

One-Way Valves in Veins

Structures that prevent backward blood flow, aiding in efficient blood return to the heart.

Vasoconstriction and Vasodilation

Mechanisms that alter blood volume in veins to adapt to physiological needs.

Temperature Regulation

The role of veins in controlling blood flow near the skin's surface to regulate heat loss.

Poiseuille’s Law

A principle describing fluid flow through a cylindrical tube, relevant for understanding blood flow in vessels.

Flow Rate (Q)

The rate of fluid flow determined by tube dimensions and fluid properties, influenced by radius and pressure difference.

Pressure Difference (∆P)

The driving force for fluid flow, with greater differences leading to higher flow rates.

Resistance

The opposition to flow in a tube, affected by viscosity, length, and radius of the vessel.

Systemic Vascular Resistance (SVR)

The resistance encountered by blood flow in the systemic circulation, influenced by blood viscosity, vessel length, and diameter.

Blood Pressure Gradient

The decrease in blood pressure from arteries to veins due to increased resistance in smaller vessels.

Korotkov Sounds

Sounds associated with blood pressure measurement, indicating systolic and diastolic pressures.

Baroreceptors

Mechanoreceptors that respond to blood pressure changes, located in the carotid sinus and aortic arch.

Frank-Starling Mechanism

The relationship between preload and stroke volume, where decreased preload leads to reduced stroke volume.

Compensatory Mechanisms

Body responses such as increased heart rate and peripheral vasoconstriction to maintain cardiac output during decreased venous return.