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Anatomy 2320 > Cirrculation > Flashcards

Cirrculation Flashcards

1
Q

Inner most layer of arteries/ veins

A

Túnica íntima

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2
Q

Middle layer of vein/ artery

A

Túnica media

Smooth muscle vasoconstricción

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3
Q

Outer layer of veins/ artery

A

Tunica externa

Anchors blood vessels

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4
Q

Small arteries found in túnica externa

A

Vaso vasorum

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5
Q

3 types of arteries

A

Elastic

Muscular

Arterioles

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6
Q

Elastic arteries

A

Largest

Elastic fibers in all 3 tunics

Branch into muscular arteries

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7
Q

Muscular arteries

A

Medium size

2 concentric rings of elastic fibers
Internal elastic lamina
External elastic lamina

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8
Q

Arterioles

A

Smallest

Contain smooth muscle in tunica media

Contraction leads to increase bp

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9
Q

What does the inner ring of muscular artery do

A

Internal elastic lamina

Separates tunica íntima from media

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10
Q

What does the outer ring of muscular artery do

A

External elastic lamina

Separates túnica media from externa

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11
Q

Which layer do capillaries have

A

Túnica íntima only

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12
Q

What is each capillary bed fed by

A

Metarteriole

Supplies true capillaries

Contains a ring of smooth muscle

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13
Q

Branches off the metarteriole and becomes

A

Thoroughfare channel

Connects to postcapillary venule

Becomes the venous system

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14
Q

Three types of capillaries

A

Continuous

Fenestrated

Sinusoid

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15
Q

Continuous capillary

A

Most common, complete lining

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16
Q

Fenestrated

A

Contains pores that allow fluid exchange

17
Q

Sinusoid capillary

A

Contain large gaps in membrane

Transport large molecules + cells

18
Q

Veins categorized into two groups

A

Venules

Small medium and large

19
Q

Venules

A

Smallest veins

The smallest are postcapillary venules
Diapedesis occurs

20
Q

Small medium and large veins

A

S+M travel with muscular arteries

L travels to elastic arteries

Most contain valves

21
Q

Skeletal muscle pump

A

Squeeze veins when muscle contracts

Forces blood towards heart

22
Q

Respiratory pump

A

Abdominal pelvic cavity

Veins are compressed when diaphragm contracts

Compensate for low bp in veins

23
Q

Systemic circulation

A

Starts at ascending aorta

24
Q

Systemic circulation

A

Starts at ascending aorta

25
Q

Two branches of ascending aorta

A

Left coronary artery

Right coronary artery

26
Q

3 branches of the aortic arch

A

Brachiocephalic trunk
Bifurcates to R common carotid +right subclavian

Middle: left common carotid

Final: left subclavian

27
Q

What does the aortic arch become

A

Descending thoracic aorta

Crosses through diaphragm becomes descending abdominal aorta

28
Q

Bronchial arteries

A

3 or 4 small arteries that branch off to supple respiratory system

29
Q

Descending abdominal aorta bifurcates into

A

R+L common iliac arteries

30
Q

What is the IVC formed from

A

R+L common iliac veins

Anatomy 2320 (7 decks)

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