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Histology YR1 > Histology of CVS > Flashcards

Histology of CVS Flashcards

1
Q

What does the epicardium consist of

A

Single layer of mesothelial cells and underlying connective tissues and adipose tissue
Blood vessels and nerves they supply the heart present in epicardium surrounded by apidose tissue

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2
Q

What does the myocardium consist of

A

Cardiac muscle

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3
Q

What does endocardium consist of

A

Endothelium consisting of simple squamous epithelial cells
Subendothelial layer of connective tissue consisting of collagen and elastic fibres and smooth muscle cells
Subendocardium consisting of loose connective tissue and branches of the purkinje

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4
Q

What is fibrosa

A

Ventricular surface of AV vales and arterial surface of SL valves
Covered by layer of endothelial cells
Composed primarily of densely packed type I and II collagen fibres and elastic fibres

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5
Q

What is the spongiosa

A

Middle layer of valve leaflet

Consists of loosely arranged collagen and elastic fibres surrounded by ground substances

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6
Q

What is ventricularis/atrialis

A

Immediately adjacent to ventricular/atrial surface of each valve
Covered with endothelium; dense connective tissue layer with collagen and elastic fibres

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7
Q

What is tunica intima

A

Innermost layer of the vessel

Consists of endothelium, subendothelial layer and elastic membrane

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8
Q

What is tunica media

A

Middle layer of the vessel

Consists primarily of vascular smooth muscle cells

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9
Q

What is tunica adventitia

A

Outermost connective tissue layer

Consists primarily of collagenous tissue and relatively few elastic fibres

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10
Q

Theee types of arteries

A

Large arteries
Medium arteries
Arterioles

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11
Q

What does tunica intima of large artery consist of

A

Endothelial lining with its basal lamina- single layer of squamous epithelial cells
Subendothelial layer - loose connective tissue containing collagen and elastic fibres smooth muscles cells
Internal elastic membrane

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12
Q

What does tunica media consist of in large arteries

A

Elastin in the form of fenestrated sheets or lamellae between muscle cell layers
Vascular smooth muscle cells arranged in layers
Collagen fibres and proteoglycans synthesised and secreted by the moth muscle cells

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13
Q

Tunica adventitia of the large arteries

A

Collagen and elastic fibres
Fibroblasts and macrophages
Vasa Vasorum

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14
Q

Tunica intima of medium arteries

A

Consists of endothelial lining with its basal lamina
Contains prominent internal elastic membrane
Thinner than TI in elastic arteries

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15
Q

Tunica adventitia of medium arteries

A

Relatively thick
Consists of fibroblasts collagen and elastic fibres and in some adipose tissue
Separated from TM by external elastic membrane
Contains vasa vasorum

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16
Q

Tunica media of medium arteries

A

Composed almost entirely of vascular smooth muscle cells arranged in spiral pattern
Cells scattered among collagen fibres
Contains very little elastic material

17
Q

Tunica intima of small arteries/arterioles

A

Consists of endothelium and Subendothelial connective tissue
Small artery- internal elastic membrane present
Arteriole- internal elastic membrane may or may not be present

18
Q

Tunica media of small arteries/arterioles

A

Smooth muscle cells arranged in layers

18
Q

Tunica media of small arteries/arterioles

A

Smooth muscle cells arranged in layers

19
Q

Tunica adventitia of small arteries/arterioles

A

Connective tissue containing collagen fibres and fibroblasts

Thin and undefined

20
Q

what do venules contain

A

postcapillary - contain endothelial lining with a basal lamina and pericytes
muscular - contain one or two layers of vascular smooth muscle that constitutes a TM; have a thin TA

21
Q

what do small veins constitute

A

TI, TM and TA all present
TM usually consists of two or three layers os vascular smooth muscle
have thicker TA compared to venules

22
Q

tunica intima of medium veins

A

endothelium with basla lamina
subendothelial layer of connective tissue
internal elastic membrane sometimes oresent

23
Q

tunica media of medium veins

A

several layers of smooth muscle cells in circular pattern, interspersed with collagen and elastic fibres

24
Q

Tunica adventitia of medium veins

A

composed of collagen and elastic fibres thicker than TM

25
Q

Tunica intima of large veins

A

endothelium with basal lamina
Small amount of subendothelial layer of connective tissue
some smooth muscle cells

26
Q

tunica media of large veins

A

relatively thin

consists of circumferentially arranged smooth muscle cells, collagen fibres and fibroblasts

27
Q

tunica adventitia of large veins

A

thickest layer, consists of collagen and elastic fibres, fibroblasts, smooth muscle cells

28
Q

three types of capillaries

A

continuous
fenestrated
discontinous

29
Q

what is continous capillaries

A

uninteruppted vasular endothelium resting on contious basal lamina

30
Q

what is fenestrated capillaries

A

cells have opening called fenestrations; have continuous basal lamina

31
Q

what are discontinous capillaries

A

cells have large openings, separated by wide irregular gaps

Histology YR1 (6 decks)

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