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Histology Term 1 > MicroVascular > Flashcards

MicroVascular Flashcards

1
Q

What are the three types of blood circulatory systems?

A
  • Systemic
  • Pulmonary
  • Portal
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2
Q

How many liters are in the blood circulatory system?

A

3L

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3
Q

How many liters are in the Lymphatic circulatory system?

A

3L

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4
Q

What are the layers of the blood vessel?

A
  • Tunica Intima
  • Tunica Media
  • Tunica Adventitia
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5
Q

What is contained within the tunica intima?

A
  • endothelial cells
  • basal lamina
  • subendothelial space (Elastic Fibers & fibroblasts)
  • Internal elastic lamina (Elastic fibers)
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6
Q

What is contained within in the tunica media?

A
  • Smooth muscle cells
  • elastic Fibers
  • collagen III reticular fibers
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7
Q

What is contained within the tunica adventitia?

A
  • Fibroblasts & Collagen I fibers
  • some smooth muscle
  • Sympathetic Nerves
  • Vasa Vasorum
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8
Q

What makes the endothelial cell frictionless/non-thrombotic?

A
  • Negatively charged surface

- (Blood is also negatively charged)

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9
Q

What are Vasa Vasorum?

A

vessels of the vessel

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10
Q

Where are vasa vasorum located?

A

tunica adventitia

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11
Q

Can smooth muscle cells create fibers in the tunica media?

A

-yes

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12
Q

What is the terminal end of an arteriole?

A

Metarteriole

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13
Q

What is the purpose of the subendothelial space in the Tunica Intima?

A

allows for distortion of the endothelial layer during systole

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14
Q

Where is the internal elastic lamina seen?

A

-the Tunica intima of large vessels

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15
Q

What causes the rebounding (diastole) in large elastic arteries?

A

The tunica media elastic fibers (subendothelial space)

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16
Q

What direction are the elastic fibers in the tunica intima oriented in large elastic arteries?

A

Longitudinal

17
Q

What direction are the elastic fibers in the tunica media oriented in large elastic arteries?

A

Circumferential

18
Q

What are the four forces that act in capillaries?

A
  1. Hydrostatic
  2. Osmotic
  3. Diffusion Gradients
  4. Transcytosis
19
Q

What are fenestrae?

A

“windows” in capillary endothelial cells that allow exchange of nutrients/wastes

20
Q

What do portal vessels do?

A

connect one capillary bed to another

21
Q

Where in the vasculature do white blood cells enter damaged or infected tissues?

A

Postcapillary venules

22
Q

What is an easy way to tell a vein from an artery?

A

-the lumen diameter will exceed the thickness of the wall

23
Q

What are the three types of capillaries?

A
  • Continuous
  • Fenestrated
  • Sinusoids (discontinuous)

Histology Term 1 (15 decks)

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