Mass Transport- Veins (BV) Flashcards

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1
Q

What valves are present in veins?

A

Semi lunar valves

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2
Q

What is in the middle layer of a vein?

A

It has less elastic and muscle fibres compared to arteries

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3
Q

What does a vein consist of and how does it compare to an artery?

A

1) Wider lumen than an artery
2) Lower amount of Endothelium
3) Thinner middle coat
4) Thinner outer layer- with a lower amount of collagen

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4
Q

what do muscle contractions allow in the veins to do?

A

Temporarily increases pressure which pushes blood back up to the heart

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5
Q

What does the respiratory pump allow?

A

When breathing in the pressure in the thorax is reduced.

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