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Histology > IX - Circulatory System > Flashcards

IX - Circulatory System Flashcards

1
Q

Heart: inner layer of endothelium and subendothelial connective tissue

A

endocardium

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2
Q

Heart: middle muscular layer

A

myocardium

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3
Q

Heart: connective tissue with many adipocytes and covered by mesothelium

A

epicardium

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4
Q

Cardiac Conducting System

A

SA node, AV node, AV bundle of His, Purkinje fibers

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5
Q

Cardiac Conducting System: just beneath the endocardium of both ventricles

A

Purkinje fibers

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6
Q

Cardiac Conducting System: greater diameter, abundant glycogen, sparse bundle of myfibrils

A

Purkinje fibers

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7
Q

BV Layers: large vein

A

tunica externa, media, intima, endothelium

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8
Q

BV Layers: elastic artery

A

tunica externa, media, intima (internal elastic layer, endothelium)

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9
Q

BV Layers: medium vein

A

tunica externa, media, intima, endothelium

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10
Q

BV Layers: muscular artery

A

tunica externa, media, intima, endothelium

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11
Q

BV Layers: venule

A

tunica externa, endothelium

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12
Q

BV Layers: arteriole

A

smooth muscle cells (tunica media), endothelium, basal lamina

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13
Q

BV Layers: fenestrated capillaries

A

endothelial cells with pores

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14
Q

BV Layers: continuous capillaries

A

endothelial cells without pores

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15
Q

BV: thick walls with small lumen, rounded

A

arteries

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16
Q

BV: thin walls with large lumen, flattened

A

veins

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17
Q

Artery Layers: endothelium appears wavy due to the constriction of smooth muscle, internal elastic membrane present in larger vessels

A

Tunica Intima

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18
Q

Artery Layers: thickest layers, smooth muscle, elastic fibers, external elastic membrane present in larger vessels

A

Tunica Media

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19
Q

Artery Layers: thinner than tunica media in all but the largest arteries, collagen, elastic fibers, nervi vasorum, vasa vasorum

A

Tunica Adventitia

20
Q

Vein Layers: endothelium appears smooth, no internal elastic membrane

A

Tunica Intima

21
Q

Vein Layers: thinner than tunica adventitia, smooth muscle cells, collagen fibers, nervi vasorum, vasa vasorum, no external elastic membrane

A

Tunica Media

22
Q

Vein Layers: thickest layer, collagen, smooth fibers, some smooth muscle fibers, nervi vasorum, vasa vasorum

A

Tunica Adventitia

23
Q

Capillaries: many tight junctions, all exchange occur through cells

A

continuous

24
Q

Capillaries: small pores

A

fenestrated

25
Q

Capillaries: larger lumen, large spaces between endothelial cells, discontinuous basal lamina

A

discontinuous, sinusoids

26
Q

Arteries: direction of blood flow

A

away from heart

27
Q

Arteries: appearance

A

rounded

28
Q

Arteries: pressure

A

high

29
Q

Arteries: wall thickness

A

thick

30
Q

Arteries: oxygen concentration

A

high - systemic, low - pulmonary

31
Q

Arteries: valves

A

not present

32
Q

Veins: direction of blood flow

A

towards heart

33
Q

Veins: appearance

A

flattened

34
Q

Veins: pressure

A

low

35
Q

Veins: wall thickness

A

thin

36
Q

Veins: oxygen concentration

A

low - systemic, high - pulmonary

37
Q

Veins: valves

A

present in most, limbs, inferior to the heart

38
Q

Collect excess interstitial fluid (lymph) from tissue spaces and return it to blood, distribute lymphocytes, antibodies, other immune components

A

Lymphatic Circulation

39
Q

Lymphatic Circulation

A

lymphatic capillaries/lymphatics → lymphatic vessels → thoracic duct/right lymphatic duct

40
Q

Lymphatics are found in most organs except

A

CNS, bone marrow

41
Q

Lymphatic Vessels: Structure

A

similar to veins but with thinner walls and no distinct separation between tunics, (+) valves

42
Q

Location of endothelium

A

Tunica Intima

43
Q

Nevi vasorum control

A

vasoconstriction and vasodilation

44
Q

Closer to the heart, arteries are expected to have a higher percentage of

A

elastic fibers

45
Q

Leaky type of capillary in the liver

A

sinusoid capillary

Histology (17 decks)

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