Vascular Physiology Flashcards

0
Q

What is the aortic pressure in the systemic circulation?

A

120 mmHg

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1
Q

Blood vessels are classified according to size, name the 6 classifications of blood vessels.

A
  • Aorta and Pulmonary artery
  • Arteries
  • Arterioles
  • Capillaries
  • Venules
  • Veins
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2
Q

What is the pressure gradient in the systemic circulation?

A
  • 80 mmHg when heart relaxed

- 120 mmHg when heart contracts

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3
Q

What is the gradient of blood pressure in the pulmonary circulation?

A

25 mmHg - 10 mmHg

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4
Q

What is the blood pressure in veins?

A

Virtually zero

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5
Q

What are the 3 layers found in blood vessel walls?

A
  • Tunica intima
  • Tunica media
  • Tunica adventitia
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6
Q

Which type of blood vessel is different in that it does not have 3 layers in the vessel walls?

A
  • Cappilaries
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7
Q

What is the innermost layer in blood vessels?

A

Tunica intima

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8
Q

What is the Tunica intima composed of?

A

Endothelial cells sitting on a basal lamina

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9
Q

What is the middle layer in blood vessels called?

A

Tunica media

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10
Q

What does the Tunica media contain?

A

Smooth muscle cells - control blood vessel diameter
Elastin
Collagen

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11
Q

What is the outmost layer of blood vessels called ?

A

Tunica adventitia

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12
Q

What does the Tunica adventitia contain?

A

Fibrous connective tissue

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