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My Cardiopulmonary > Lecture 3A > Flashcards

Lecture 3A Flashcards

0
Q

Why is the Aortic wall distensible?

A

Because it has a large amount of elastic tissue

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1
Q

5 sections of the Aorta

A
  1. Ascending Aorta
  2. Aortic Arch
  3. Descending Aorta
  4. Thoracic Arch
  5. Abdominal Aorta
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2
Q

Where is blood pressure at its highest under normal conditions?

A

Ascending Aorta

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3
Q

Name the three layers of an artery

A
  1. Tunica Intima
  2. Tunica Media
  3. Tunica Externa (or adventitia)
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4
Q

What layer contains the CT of the artery?

A

Tunica externa

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5
Q

Which layer houses the endothelium of the artery

A

Tunica Intima

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6
Q

Which layer contains the smooth muscle and elastic tissue of an artery

A

Tunica Media

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7
Q

What is the site of the greatest resistance and largest pressure drop in the circulation?

A

Arterioles

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8
Q

What can induce a change in the the radius of an artery or arteriole

A
  1. Autonomic nervous system
  2. Circulating hormones (Angiotensin II, Vasopressin)
  3. Local Vasoactive substances
  4. Other (e.g. temperature)
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9
Q

which vessels have the greatest total cross-sectional and surface area?

A

Capillaries

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10
Q

Endothelial cells in capillaries may have small pores called what?

A

Fenestrations

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11
Q

Merged capillaries form what?

A

Venules –> Veins

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12
Q

Do arteries or veins have the thinner wall?

A

Veins

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13
Q

Which vessel (arteries or veins) operate under Lower pressures?

A

Veins

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14
Q

Which vessels contain the highest proportion of blood in the cardiovascular system at any given time

A

Veins

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15
Q

The superior and Inferior Vena cava are collectively called what?

A

Vena Cavae

16
Q

What do the Vena Cavae do?

A

Drain deoxygenated into the right atrium

17
Q

What is the largest vein in the body

A

Inferior Vena Cava

18
Q

The inferior portion of the the Inferior Vena Cava begins at what juncture

A

Juncture of the Common Iliac veins

19
Q

The superior vena cava is formed by what two veins?

A

The convergence of the Right and Left Brachiocephalic veins

20
Q

The Celiac trunk of the abdominal aorta supplies blood to what structures (6)

A
  1. Liver
  2. Gallbladder
  3. Stomach
  4. Spleen
  5. Pancreas
  6. Duodenum
21
Q

What branch of the abdominal aorta supplies blood to the small intestine and the large intestine

A

Superior Mesenteric

22
Q

What branch of the abdominal aorta supplies blood to the Large Intestine and Rectum

A

Inferior Mesenteric

23
Q

What is the Hepatic Portal System

A
  • Blood from abdominal parts of GI system and spleen pass through this secondary venous system which drains in the liver before ultimately returning to the right atrium of the heart

My Cardiopulmonary (17 decks)

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