Mass Transport- Arteies (BV) Flashcards

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1
Q

What are the four main layers that make up an artery?

A

Lumen, Endothelium, Middle layer and Outer layer

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2
Q

What type of cell type is the endothelium?

A

Smooth squamous

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3
Q

What is the purpose of the endothelium?

A

To reduce friction between the blood vessel and blood

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4
Q

What does the ticker middle layer contain?

A

Muscles fibres

Elastic fibres

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5
Q

What happens to the elastic tissues as you move away from the heart?

A

There are fewer elastic fibres and more muscle fibres

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6
Q

What does the outer layer contain?

A

Tough collagen fibres

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7
Q

What four main substances does the blood carry?

A

White Blood Cells
Red Blood Cells
Platelets
Hormones

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8
Q

An artery is an organ.

What is an organ?

A

A collection of different tissues that work together to achieve a particular function.

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9
Q

Why are artery walls thick?

A

To withstand high pressure of blood

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10
Q

Describe the walls of arterioles.

A

They contain much more smooth muscle fibres compared to arteries.

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11
Q

Why do arterioles have more smooth muscle fibres?

A

So that they can contract, reducing the diameter of the lumen and reducing blood flow.

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12
Q

What do contractions of arterioles help?

A

The volume of blood flowing into a tissue at a particular time

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