lecture 12/13: Histology of CV System (Baekey) Flashcards Preview

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Flashcards in lecture 12/13: Histology of CV System (Baekey) Deck (43):
1

Where is number of vessels and cross sectional area greatest?

capillaries

2

where is most blood volume?

veins

3

What kind of vessel has the most elastic tissue?

large arteries

4

in which vessels is elastic tissue absent?

capillaries, venules

5

Table p. iii on Histo section in SCAVMA

:)

6

how do blood vessels develop?

vacuole fusion

7

how are endothelial cells joined?

intercellular junctions

8

Components of tunica intima in elastic arteries (3)

endothelium, subendothelium, internal elastic membrane

9

Components of tunica media in elastic arteries (3)

smooth muscle, elastic fibers, collagenous fibers

10

Components of tunica externa in elastic arteries (3)

collagenous fibers, nervi vasorum, vasa vasorum

11

vasa vasorum

network of small blood vessels that supply large blood vessels ("vessels of the vessels")

12

Difference b/w elastic and muscular arteries

exactly the same, except muscular arteries do not have collagenous fibers

13

Pericytes

aka pericapillary cells.Wrap around fenestrated capillaries to keep proteins in the capillaries and let fluid through (regulate permeability through capillary to help create urine)

14

How is blood flow regulated through capillaries?

precapillary sphincters of arteriole control flow into capillary bed proper. Anteriolar-venous anastomoses connect terminal arteriole directly with a venule

15

continuous capillary and found where?

tight junctions between endothelial cells. Found in muscle, lungs, nervous system

16

fenestrated capillaries are found where?

pores present in endothelial cells and basal lamina. Found in endocrine glands, intestine, kidneys

17

Sinusoidal capillaries and where found?

large diameter and gaps. Basal lamina diminished or absent. Found in liver, spleen, bone marrow

18

Tunica media and intima in veins vs. arteries

veins have less developed/thinner tunica intima and media than arteries

19

venules

Formed where several capillaries meet. May form portal systems b/w two capillary networks (i.e. hepatic)

20

tunica intima of veins contains (3)

endothelium, thin subendothelium, valves

21

tunica media of veins contains

limited muscle and elastic fibers

22

tunica externa of veins contains

collagenous fibers

23

Endocardium in heart includes: (3)

endothelium, subendothelial coat, subendocardial coat. Analogous to tunica intima

24

Myocardium in heart =

cardiac muscle

25

epicardium in heart includes (2)

subepicardial coat, serous mesothelium

26

between which layers are purkinje fibers located

endocardium and myocardium

27

epicardium =

visceral pericardium

28

annuli fibrosi

fibrous rings that surround each of the heart valves in bovine. Continuous with the connective tissue of the valve

29

ossa cordis

bone formation around aortic valve in bovine

30

trigonum fibrosum

fibrous triangle b/w AV canals in dogs

31

lymph capillary vs. capillary

lymph capillaries have little or no basal lamina (makes them more permeable). Also have anchoring microvilli

32

Lymph vessel vs. vein

thinner walled, irregularly shaped, tunics not well defined

33

what kind of artery is aorta?

elastic artery

34

where is external elastic membrane located?

between tunica externa and tunica media

35

Veins have ______ band of internal elastic membrane, while arteries have ______ band of internal elastic membrane

discontinuous; continuous

36

What structures are present in connective tissue between artery and veins?

nervi vasorum, vasa vasorum, arterioles, capillaries

37

What kind of cells are glands (i.e. bile duct) surrounded by?

cuboidal

38

glomerular capillaries =

fenestrated capillaries

39

podocyte

a specialized pericyte in the glomerulus of the kidney. Wrap around fenestrated capillaries to keep proteins in the capillaries and let fluid through (regulate permeability through capillary to help create urine)

40

mesangial cells

form the "glue" that holds fenestrated capillaries in a ball within glomerulus

41

sinusoidal capillary diameter compared to continuous and fenestrated capillaries

larger

42

portal triad contains

bile duct + artery + vein

43

what makes up skeleton of valves?

hyaline cartilage. Stains purple/blue

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