## Physiology

### Cardiovascular System

Question
6 out of 16

Laminar flow is dependent on: (LQ)

 A Critical velocity B Viscosity C Constant velocity D Critical closing pressure

Ans. A Critical velocity
1. The flow of blood in the blood vessels is normally laminar (stream line). Within the blood vessels, an infinitely thin layer of blood in contact with the al1 of the vessel does not move. The next layer within the vessel has a low velocity, the nest a higher velocity, and so forth, velocity being greatest in the center of the stream.
2. Laminar flow occurs at velocities up to a certain CRITICAL VELOCITY. At or above this velocity flow is turbulent. Q