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Biology > Chapter 20 > Flashcards

Chapter 20 Flashcards

1
Q

What are the three layers of the blood vessel wall ?

A

Tunica interna, tunica media, and tunica externa

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2
Q

What are hemorrhoids ?

A

Varicose veins of the anal canal

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3
Q

What are arteries ?

A

The efferent vessels of the cardiovascular system that carry blood away from the heart

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4
Q

What are veins ?

A

The afferent vessels that carry blood back to the heart

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5
Q

What are capillaries ?

A

Microscopic, thin-walled vessels that connect the smallest arteries to the smallest veins

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6
Q

What is tunica externa composed of ?

A

Loose connective tissue

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7
Q

What is tunica interna composed of ?

A

Simple squamous epithelium

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8
Q

What is tunica media composed of ?

A

Smooth muscle, collagen, and elastic tissue in some cases

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9
Q

What is the force that blood exerts against a vessel wall ?

A

Blood pressure

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10
Q

What is the most common capillary type ?

A

Continuous capillaries

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11
Q

What are the 3 capillary types ?

A

Continuous, fenestrated, and sinusoids

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Biology (22 decks)

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