The smallest vessels of the arterial system are the .

Blood flowing out of the capillary complex first enters small .

The entrance to each capillary is guarded by a band of smooth muscle, the .

The blood flow within any one capillary occurs in a series of pulses called .

The force that pushes water "out" of solution is

A force that pulls water "into" a solution is .

The difference between the systolic and diastolic pressures is the .

The instrument used to determine blood pressure is called a .

For circulation to occur, the circulatory pressure must be greater than the .

The regulation of blood flow at the tissue level is called .