IX - Circulatory System Flashcards Preview

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Flashcards in IX - Circulatory System Deck (45)
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1

Heart: inner layer of endothelium and subendothelial connective tissue

endocardium

2

Heart: middle muscular layer

myocardium

3

Heart: connective tissue with many adipocytes and covered by mesothelium

epicardium

4

Cardiac Conducting System

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

5

Cardiac Conducting System: just beneath the endocardium of both ventricles

Purkinje fibers

6

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

Purkinje fibers

7

BV Layers: large vein

tunica externa, media, intima, endothelium

8

BV Layers: elastic artery

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

9

BV Layers: medium vein

tunica externa, media, intima, endothelium

10

BV Layers: muscular artery

tunica externa, media, intima, endothelium

11

BV Layers: venule

tunica externa, endothelium

12

BV Layers: arteriole

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

13

BV Layers: fenestrated capillaries

endothelial cells with pores

14

BV Layers: continuous capillaries

endothelial cells without pores

15

BV: thick walls with small lumen, rounded

arteries

16

BV: thin walls with large lumen, flattened

veins

17

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

Tunica Intima

18

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

Tunica Media

19

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

Tunica Adventitia

20

Vein Layers: endothelium appears smooth, no internal elastic membrane

Tunica Intima

21

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

Tunica Media

22

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

Tunica Adventitia

23

Capillaries: many tight junctions, all exchange occur through cells

continuous

24

Capillaries: small pores

fenestrated

25

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

discontinuous, sinusoids

26

Arteries: direction of blood flow

away from heart

27

Arteries: appearance

rounded

28

Arteries: pressure

high

29

Arteries: wall thickness

thick

30

Arteries: oxygen concentration

high - systemic, low - pulmonary