chat 14: blood vessels Flashcards

1
Q

tunica internal location in bv

A

artery and vein

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2
Q

endothelium location in bv

A

artery and vein

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3
Q

basement membrane location in bv

A

artery and vein

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4
Q

tunica medua location in bv

A

artery and vein

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5
Q

smooth muscles location in bv

A

artery and vein

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6
Q

tunica externa location in bv

A

artery and vein

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7
Q

big lumen location in bv

A

vein

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8
Q

smaller lumen location in bv

A

artery

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9
Q

valves location in bv

A

vein

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10
Q

thicker smooth muscles location in bv

A

artery

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11
Q

Tunica internal/ intima components

A
  • endothelium
  • basement membrane
  • basal lamina
  • internal elastic lamina
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12
Q

endothelium in bv function

A

innermost lining, squamous epithelium

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13
Q

basement membrane function

A

-physical support for epithelial layer

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14
Q

what attaches endothelium to bv?

A

basement membrane

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15
Q

basement membrane structures

A

collagen fibers

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16
Q

basal lamina function

A

anchors endothelium to underlining connective tissue

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17
Q

internal elastic lamina function

A

-seperates t internal from t media

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18
Q

internal elastic lamina structure

A

thicker in artery

thick layer of smooth muscles

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19
Q

tunica media structure

A

muscular and connective tissues, elastic fibers, , thick smooth muscles

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20
Q

function of tunica media

A

adjust diameter of lumen -> blood flow and bp (vasodilation and vasoconstriction)

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21
Q

tunica externa structure

A

elastic and collagen fibers

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22
Q

what separates t external from t media

A

external elastic lamina

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23
Q

vaso vasorum

A

-vessels within vessels

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24
Q

tunica external function

A

anchor vessels to surrounding tissue

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25
Q

what bv has high compliance?

A

arteries

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26
Q

high compliance meaning

A

large volume of blood ejected so it expands w/o stretching

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27
Q

what does the t media allow in arteries

A

increase in diameter

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28
Q

which bv has a think tunica media

A

elastic/ conducting artery

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29
Q

which artery is the internal and external elastic laminae well defined?

A

artery

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30
Q

where is elastic lamella a yellow colour?

A

elastic artery/ conducting artery

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31
Q

what artery does the aorta have?

A

elastic artery/ conducting artery

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32
Q

location of elastic artery/ conducting artery

A

aorta, pulmonary trunk, subclavian, common carotid, iliac carotid and brachiocephalic

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33
Q

what artery does the pulmonary trunk have?

A

elastic artery/ conducting artery

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34
Q

what artery does the brachiocephalic have?

A

elastic artery/ conducting artery

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35
Q

what artery does the subclavian have?

A

elastic artery/ conducting artery

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36
Q

what artery does the common carotid have?

A

elastic artery/ conducting artery

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37
Q

what artery does the iliac carotid have?

A

elastic artery/ conducting artery

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38
Q

which artery is the pressure reservoir?

A

elastic artery/ conducting artery

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39
Q

muscular/ distribution artery size

A

medium

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40
Q

muscular/ distribution artery function

A

take blood to systems

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41
Q

which artery has more smooth muscles?

A

muscular/ distribution artery

42
Q

which artery has less elastic fibers?

A

muscular/ distribution artery

43
Q

more number of smooth muscles in muscular/ distribution artery allows….?

A

greater vasodilation and vasoconstriction

44
Q

which artery has a well defined internal el but a thin external el?

A

muscular/ distribution artery

45
Q

vascular tone meaning

A

organs are partially contracted, prevents organs from collapsing

46
Q

which artery has more vascular tone?

A

muscular/ distribution artery

47
Q

which artery has a thicker t externa?

A

muscular/ distribution artery

48
Q

arterioles are also known as

A

resistance vessels

49
Q

how many arterioles/ resistance vessels are there?

A

~400 million

50
Q

diameter of arterioles/ resistance vessels

A

15-30um

51
Q

smaller diameter in arterioles/ resistance vessels means

A

increase resistance , and allows regulates blood flow into capillaries

52
Q

size of t interna and elastic lamina in arterioles/ resistance vessels

A

thinner

53
Q

how many layers of smooth muscles in arterioles/ resistance vessels

A

1-2

54
Q

how many layers of smooth muscles muscular/ distribution artery?

A

40 layers

55
Q

location of muscular/ distribution artery

A

-brachial
-radial
-femoral
-axillary
, arteries

56
Q

location of metarteriole

A

end of arteriole

57
Q

metarteirole structure

A

precapillary sphincter regulates blood flow

58
Q

how many capillaries are there?

A

~20 billion

59
Q

diamater of capillary

A

5-10um

60
Q

CAPILLARY FUCNTION

A

exchange

61
Q

do capillaries have t external and t media ?

A

non

62
Q

capillary structure

A

single layer endothelium and basement membrane

63
Q

types of capillaries

A
  • continuous
  • fenestrated
  • sinusoid
64
Q

what does the plasma membrane of endothelium cells form in continuous capillaries

A

continuous tubes that are interpreted by intracellular clefts

65
Q

what is the brachial artery made of?

A

muscular/ distributing artery

66
Q

what is the radial artery made of?

A

muscular/ distributing artery

67
Q

what is the femoral artery made of?

A

muscular/ distributing artery

68
Q

what is the axillary artery made of?

A

what is the radial artery made of?

69
Q

location of continuous capillary

A
  • CNS
  • skeletal and smooth muscles
  • connective tissue
  • lung and skin
70
Q

what does the plasma membrane of endothelium cells form in fenestrated capillaries ?

A

fenestrations aka holes (70-100nm)

71
Q

location of fenestrated capillaries

A
  • kidney
  • villi
  • choroid plexuses of ventricles
  • brain
  • endocrine gland
  • eyes
72
Q

WHICH capillary is the widest + most winding?

A

sinusoid

73
Q

what does the plasma membrane of endothelium cells form in sinusoid capillaries

A

largest fenestrations / holes

74
Q

function of sinusoid capillaries

A

allow large proteins and some rbc in

75
Q

which capillary has incomplete or absent basement membrane

A

sinusoid

76
Q

venules wall size

A

thin walls

77
Q

venules and veins function

A

drain blood from capillary and take it towards the heart

78
Q

diameter of venules

A

10-50um

79
Q

structure of venule

A

loose intracellular junction + porous

80
Q

can post capillary venules exchange nutrients, waste and WBC ?

A

yes

81
Q

post capillary venules function

A

transport blood from capillaries into venule

82
Q

muscular venules es can’t

A

exchange with isf, cuz walls are thick

83
Q

diameters of veins

A

0.5mm to 3cm

84
Q

less smooth muscles and elastic fibers in

A

veins

85
Q

which bv has the thickest t externa and the most amount of collagen fiber?

A

veins

86
Q

which bv has valves?

A

veins

87
Q

which bv Is the most numerous

A

veins

88
Q

what bv can adapt to variations in the volume and pressure

A

veins

89
Q

fetal bv + flow of blood through heart

A
umbilical vein
ductus venosus 
inferior vena cava
r. atrium 
l. atrial 
l.ventricle
aorta 
systemic circualtion 
umbilical artery 
placenta
90
Q

placenta function

A

allows exchange of material b/w fetal and maternal circulation

91
Q

umbilical cord

A

contains bv that branch into capillaries in placenta

92
Q

where does o2 and co2 blood first mix?

A

liver

93
Q

what vein comes after the liver

A

ductos venous

94
Q

how does the blood get to the l.atria from the r. atria ?

A

formen ovale

95
Q

ductos arteriosus turns into

A

ligament arteriosum

96
Q

ligament venosum ___ in the fetal cardiovascular sys

A

ductus venous

97
Q

foramen ovale turn into

A

fossa ovalis

98
Q

umbilical arteries turn into

A

medial umbilical ligaments

99
Q

round ligament of liver/ ligamentum teres ___ in the fetal cardiovascular sys

A

umbilical veins

100
Q

location of sinusoid capillary

A
  • spleen
  • liver
  • anterior pituitary
  • parathyroid
  • adrenal gland
101
Q

which bv has the thicker tunica externa?

A

veins