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Anatomy CVS med > histology Arteries and Veins > Flashcards

histology Arteries and Veins Flashcards

1
Q

Large elastic arteries

A

aorta, large aortic branches and pulmonary arteries

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2
Q

large aortic branches eg

A

brachiocephalic, subclavian, common carotids, iliac arteries

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3
Q

Large elastic arteries اكتر اشي مميز

A

contains large amount of elastic fibres

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4
Q

الفرق بين الarteries وveins

من ناحية الwalls

A

walls of arteries are thicker than that of veins ليش

to withstand pulsatile flow

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5
Q

الفرق بين الarteries وveins

من ناحية ال blood pressure

A

blood pressures of arteries are higher than that of veins

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6
Q

احفظيها زي ما هي

A

As arteries become smaller, wall thickness gradually decreases but the ratio of wall thickness to lumen diameter increases

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7
Q

in large elastic artery

A

there are no smooth muscle, elastic fibers only.

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8
Q

Medium-sized muscular arteries eg

A

coronary and renal arteries

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9
Q

The media of Medium-sized muscular arteries contains

A

large amount of smooth muscle cells with some elastin and collagen

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10
Q

Adventitia of Medium-sized muscular arteries is

A

very broad, and mostly

contains collagen and elastin.

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11
Q

media of Small arteries and arterioles consists almost

A

of one or two layers of smooth muscle cells, and there is no External Elastic Lamina

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12
Q

adventitia of Small arteries and arterioles is

A

same size as the tunica media layer

merges in with surrounding tissue

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13
Q

intima of Small arteries and arterioles is

A

thin

single layer of squamous epithelium

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14
Q

primary site of vascular resistance

A

Layers of smooth muscle →cفي الوريداتontrolling systemic blood pressure
Arterioles

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15
Q

Small arteries and arterioles (in the substance of organs and tissues) extends and branches out

A

from an artery and leads to capillaries

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16
Q

nucleus of the smooth muscle appears

A

in a longitudinal shape arranged in a circular manner.

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17
Q

nucleus of the intima

A

in circular shape because the cells are

arranged longitudinally.

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18
Q

neuromuscular bundle”.

A

vein , artery, and nerve being together in the body

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19
Q

الفرق بين الarteries وveins

من ناحية ال قطر

A

veins have larger diameters than arteries →larger lumens

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20
Q

veins كمية الدم يلي بتحملها ال

A

two thirds of all circulating blood.

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21
Q

الفرق بين الarteries وveins

من ناحية الmedia

A

the media is much thinner in the veins due to significantly less smooth muscle and elastic tissue.

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22
Q

veins اشي ما بصير في ال

A

do not have the same capacity for elastic recoil and vasoconstriction due to Internal and External elastic layers are not seen in the veins

23
Q

How Blood is propelled forward in veins

A

by contraction of surrounding muscles and pressure created during inspiration
and expiration.

24
Q

Reverse flow is prevented in veins by

A

the presence of venous valves.

25
Q

type of wall of the veins

A

The flaccid walls

26
Q

The flaccid walls شو لازم اتذكر

A

The flaccid walls of veins predispose venous valves to penetration by tumor and inflammatory processes

27
Q

Venule has

A

clear tunica intima layer, without any elastic fibres

28
Q

Larger Vein Media layer contains

A

2-3 layers of muscle cells.

29
Q

Larger Vein Adventitia is

A

the broadest layer. It contains longitudinal collagen fibres, and vasa vasorum.

30
Q

Larger Vein Intima

A

A thin endothelial lining, (in some veins,

you may be able to see the valves).

31
Q

الفرق بين الarteries وveins

vasa vasorumمن ناحية ال

A

Adventitia in veins contains a larger number of vasa vasorum comparing with arteries because blood which
pass through veins do not contain nutrients, so veins need another source of nutrients (vasa vasorum).

32
Q

الفرق بين الarteriesMuscular وveins Muscular

A

there are no internal or external elastic layers surrounding the muscle layer
Muscular veins

33
Q

DISTINGUISHING FEATURES

A

سلايد 17

34
Q

Capillaries consist only of

A

a single layer of endothelial cells on a basement membrane. There is no media
or adventitia.

35
Q

Capillaries diameter

A

is just wide enough for passage of a red blood cell

36
Q

Capillaries flow

A

is very slow

37
Q

Capillaries function

A

exchange of oxygen, nutrients and other substances between blood and tissues.

38
Q

types of capillaries

A

Continuous
fenestrations
sinusoid capillaries

39
Q

Continuous capillaries

A

they only allow smaller molecules, such

as water and ions to pass through their intercellular clefts

40
Q

Continuous capillaries are found in

A

skeletal muscles, fingers, gonads, and skin and the central nervous system.

41
Q

Continuous capillaries

A

blood–brain barrier

42
Q

Fenestrated capillaries located in

A

the endocrine glands, intestines, pancreas, and the glomeruli of the kidney

43
Q

Fenestrated capillaries have

A
  1. Have pores in the endothelial cells

2. have continuous basement membran

44
Q

Sinusoid blood vessels are primarily located in

A

the bone marrow, lymph nodes and
adrenal glands, and are present in the liver and spleen, where greater movement
of cells and materials is necessary

45
Q

Sinusoidal (discontinuous) capillaries

A

open-pore capillary
discontinuous basement membrane
allow red and white blood and serum proteins to pass

46
Q

Sinusoidal (discontinuous) capillaries permeability

A

is increased by large inter-cellular clefts and fewer tight junctions

47
Q

broad adventitia

A
  1. large vein

2. medium size artery

48
Q

collagen

A
  1. media in general
  2. media of medium size muscular artery
  3. adventitia of large vein
  4. adventitia of medium size muscular artery
49
Q

elastin

A

media of medium size muscular artery
adventitia of medium size muscular artery
media

50
Q

venule, the lumen (containing)

A

RBC red blood cells) and

endothelial cells

51
Q

internal elastic lamina is present in

A

Arteries although it is less distinctive in large elastic

arteries).

52
Q

internal elastic membrane is absent in

A

Veins

53
Q

adventitia in veins

A

thickest layer

54
Q

adventitia in Arteries

A

thin

Anatomy CVS med (15 decks)

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