Blood vessels Flashcards

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1
Q

What are the blood vessels

A

They are are tubes that carry blood away from the heart toward the tissues of the
body and then return the blood to the heart

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2
Q

What are the 5 types of blood vessels

A
  1. Arteries - aorta
  2. Arterioles
  3. Capillaries
  4. Venules
  5. Veins - superior vena cava and inferior vena cava
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3
Q

Where does the blood flows through?

A

Blood flows through the lumen of blood vessels.

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4
Q

What are the 3 major layers of the walls of the blood vessels

A

1) tunica intima
2) tunica media
3) outer tunica externa

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5
Q

What is the tunica intima composed of

A

1) endothelium and connective tissue

2) continuous with inner lining of heart (endocardium)

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6
Q

What is the tunica media composed of

A

dense irregular collagenous connective tissue
-Vasomotor nerves
-Vaso vasora —small vessels supplying oxygen and nutrients to
tunica media and tunica externa

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7
Q

What are some differences between walls of typical artery and typical vein

A
  • Most arteries have much thicker tunica media than do veins

- Internal and external elastic lamina are much more extensive in arteries than in veins

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8
Q

What are he two major types of arteries

A

a) large elastic (conducting) arteries

b) medium-sized muscular (distributing) arteries

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9
Q

What are some characteristics of the large elastic arteries

A

1) Largest arteries in the body
2) The largest diameter among arteries
3) Elastic lamellae
4) Pressure reservoir

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10
Q

What are some characteristics of the medium-sized muscular (distributing) arteries

A

1) Capable of greater vasoconstriction and vasodilation
2) Have a well-defined tunica media
3) Control blood flow

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11
Q

What is an arteriole?

A
a branch of an artery that delivers blood to a capillary
network
1) regulate blood flow from arteries to
capillaries
2) regulate blood pressure

The metartiole is the terminal end
The precapillary sphincter the connective thing

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12
Q

Venules

A
Capillaries unite
1) form post capillary venules
2) venules unite into muscular
venules.
3) venules deliver blood from
capillaries to veins.
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13
Q

What are the 2 largest veins

A

superior vena cava and inferior vena cava

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14
Q

2 characteristics of veins

A

1) Veins lack the external or internal elastic laminae

2) Often have valves

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15
Q

What veins travel through the hypodermis

A

Superficial veins

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16
Q

What veins travel below the fascia between skeletal muscles

A

Deep veins

17
Q

What is the respiratory pump

A

action of breathing causes pressure changes within the thoracic and
abdominal cavities
resulting in the compression of abdominal veins during inhalation.