Pressure is the only form of energy determining blood flow.

Pressure in veins is always low (i.e. below 50 mmHg); lower than that in any artery.

Pressure in arteries is always high (i.e. above 50 mmHg): higher than that in any vein.

Flow velocity in veins is always low (sluggish).

One millimeter of blood would require less than 1 hour to flow through a single capillary.

The total surface area of all capillaries in an adult human is approximately 6.3 sq. meters.

Change in vascular resistance to blood flow can be determined by assessing the change in arterial pressure alone.

A Reynolds number (using radius) above 1000 always indicates the presence of turbulence; below 1000 laminar flow.

Blood flows like water (i.e. constant viscosity regardless of velocity or tube dimension).

The stretchibility (compliance) of most venous walls is far greater than that of most arterial walls at the same wall thickness.

Arterial blood always contain a higher oxygen content than venous blood.

The sounds heard through the stethoscope when taking blood pressure by the auscultatory method are made by heart valve opening and closing.

Systolic arterial blood pressure steadily declines from the root of the aorta to the smaller distal arteries.

Blood flow falls to zero only when perfusion pressure reaches zero (i.e. there is a linear relationship).

A shift to the right of the hemoglobin-oxygen dissociation curve and increasing P₅₀ value indicates an increased affinity for oxygen.