What is the definition of blood pressure?

Blood pressure refers to the force exerted by circulating blood on the walls of blood vessels as it flows through the body's circulatory system. The definition that states "pressure of blood flowing through the body" accurately captures this concept, as it encompasses the dynamic nature of blood being pumped by the heart and how that creates pressure within the vascular system.

In terms of the other definitions, while the option regarding the pressure exerted by the heart on the blood vessels is relevant, it doesn't entirely represent the broader context of blood pressure, which includes the pressure that blood exerts against arterial walls during circulation. The measurement of oxygen in the blood pertains to oxygen saturation and is not related to blood pressure at all. Lastly, resistance of blood flow in the arteries describes a factor that affects blood pressure, but it doesn't define what blood pressure itself is. The correct definition emphasizes the general concept of blood pressure as it exists throughout the body, reflecting its importance in understanding cardiovascular health.