Topic 7

Question 1

What is transmural pressure? Give the Equation.

Answer 1

The pressure across the blood vessel wall

γ = RP

Question 2

What is the law of Laplace

Answer 2

Gives the relation between wall tension and radius of the tube and pressure inside the tube.

The bigger the radius, the smaller the tension

Question 3

The pressure and volume of the heart is proportional to the…

Answer 3

Work done by the left and right side of the heart.

Question 4

Describe the flow in tubes of an elastic wall.

Answer 4

Elastic walls take some kinetic energy of the blood, converting it into elastic energy.

Allowing more fluid through a tube.

Question 5

Give the non-Newtonian fluids.

Answer 5

In the body:

Pseudoplastic Fluids are non-newtonian, they have a change in viscosity when accelerating.

Question 6

Give the Newtonian fluids of the body.

Answer 6

Water and Air

Question 7

Give the pressure drop along the circulatory system.

Answer 7

Question 8

Give the Indicator Diagram. What does it show?

Answer 8

The red closed area gives the work done by the heart

Question 9

Equation giving the Work done by the heart

Answer 9

W_{L+R =} (6/5)P₂V + Vρv₂²