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Flashcards in Flow Through Tubes Deck (14):
1

Define velocity

The rate of movement of fluid particles along the tube

2

How is flow related to cross sectional area?

Flow is inversely proportional to cross sectional area

3

Define viscosity

The extent to which the fluid layers resist sliding over one another

4

How is velocity related to viscosity?

Velocity is inversely proportional to viscosity

5

How does velocity relate to cross sectional area?

Velocity is directly proportional to cross sectional area

6

How do blood flow and radius relate?

Blood flow is proportional to the fourth power of the radius

7

How do pressure, resistance and flow relate?

Pressure = flow x resistance

8

How do we measure the resistance for vessels in series?

Add the resistances

9

How do we measure the resistance for vessels in parallel?

Resistance is lower as we add together the reciprocals of resistance of each vessel

10

How does flow change around the circulatory system?

It doesn't. Flow is the same at all points of circulation.

11

What factors may cause turbulent blood?

Velocity high
Viscosity low
Irregular lumen

12

Define bruit

A sound we hear on auscultation

13

What happens to resistance as the vessel stretches?

resistance falls

14

Define flow

The volume of fluid passing a given point per unit time