Q2 of 95 Page 94

Give the structural differences between an artery and a vein.







Artery


a) Have thick & more muscular walls.


b) Walls are elastic. (Tunica media thicker)


c) Have narrow lumen.


d) Have no valves in their inner lining.



Veins


a) Have thin & less muscular walls.


b) Walls are less elastic. (Tunics media thinner)


c) Have wider lumen


d) Have valves in their inner lining.




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Explain the following terms:

Venule

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Explain the following terms:

Diastole

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How do you account for the following differences?

(a) The left ventricle has thicker walls than the right ventricle.


(b) The walls of the right ventricle are thicker than those of the right auricle.