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ANP1105 > Blood Vessels and Hemodynamics > Flashcards

Blood Vessels and Hemodynamics Flashcards

1
Q

blood vessels

A

delivery system of dynamic structures that begins and ends at heart

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2
Q

Arteries

A

carry blood AWAY from the heart

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3
Q

Veins

A

carry blood TOWARDS the heart

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4
Q

What is the order of the blood vessels starting FARTHEST from the heart

A

Arteries–> Arterioles –> Capillaries –> Venules –> Veins

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5
Q

What is the only blood vessel that directly serves the cells?

A

Capillaries

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6
Q

Tunica intima

A

MOST INNER

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7
Q

What does the tunica intima sit on?

A

Endothelium, Subendothelium layer, Internal elastic membrane

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8
Q

Tunica media

A

MIDDLE LAYER,

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9
Q

What is the tunica media comprised of?

A

SMOOTH muscle, elastic fibers
External elastic fibers

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10
Q

Tunica Externa

A

External/LAST layer

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11
Q

What is the tunica externa comprised of?

A

collagen fibers, vasa vasorum

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12
Q

VASA Vasorum

A

Small vessels that receive their own supply of blood

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13
Q

What are the three arterial vessels?

A

Elastic arteries, Muscular arteries, Arterioles

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14
Q

Elastic Arteries are known as

A

CONDUCTING arteries

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15
Q

Muscular Arteries are known as

A

DISTRIBUTING arteries

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16
Q

Arterioles are known as

A

RESISTANCE VESSELS (because changing diameters change resistance in blood vessels)
- small,

17
Q

Capillaries

A

Microscopic Blood Vessels, walls of thin tunica intima

18
Q

What are the three types of Capillaries found in the body

A

Continuous Capillaries, Fenestrated capillaries,
Sinusoidal capillaries

19
Q

Continuous Capillaries

A
  • least permeable and most abundant
    (found in skin, muscle and CNS)
  • LEAST LEAKY of all three
20
Q

Fenestrated capillaries

A

IN the MIDDLE!
similar to endothelial cells riddled with pores (fenestrations)
(found in small intestine, endocrine organs) not as leaky as Sinusoidal capillaries

21
Q

Sinusoidal capillaries

A

Highly modified, LEAKY capillaries
(found in liverm bone marrow, lymphoid tissues, endocrine organs)
- Large irregular lumens

22
Q

Venules

A

Formed when capillary beds unite

23
Q

Veins

A

Formed when venules converge

24
Q

In the veins, how many tunics do they have?

A

THREE
but the walls are thinner and lumens larger

25
Q

Up to what percentage of blood is there in veins at any one time?

A

65%

26
Q

What does capacitance vessels or blood resevoirs imply?

A

ANP1105 (17 decks)

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