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Basics > Blood Vessel Ultra Tissue > Flashcards

Blood Vessel Ultra Tissue Flashcards

1
Q

The average volume of blood in a man

A

6 litres

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2
Q

Three major types of vessels

A

Arteries, Veins, Capillaries

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3
Q

Three sections of vessel walls

A

Tunica intima (inner), tunica media (middle) tunica adventitia (outer)

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4
Q

Arteries found near the heart

A

Large elastic conducting arteries

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5
Q

Examples of large elastic conducting artieries

A

Aorta, pulmonary artery

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6
Q

Tunica Intima of large elastic arteries

A

Endothelial cells - has a sub endothelium of connective tissue and discontinuous elastic laminae

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7
Q

Tunica Media of elastic artery

A

40-70 fenestrated (porous) elastic membranes with smooth muscle cells and collagen in between layers

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8
Q

Tunica adventitia of elastic artery

A

Thin layer of connective tissue which contains lymphatics, nerves and vasa vasorum

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9
Q

Vasa Vasorum

A

Small vessels which supply blood to larger arteries and veins

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10
Q

Medium muscular arteries supply…

A

Blood to the sub regions of the body

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11
Q

Tunica intima of medium muscular arteries

A

Endothelium, a sub endothelial layer and a thick elastic lamina

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12
Q

Tunica media of medium muscular arteries

A

40 layers of smooth muscle joined by gap junctions to allow for co-ordinated contraction

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13
Q

Tunica adventitia of medium muscular arteries

A

Thin layer of connective tissue containing minor vasa vasorum, lymphatics and nerve fibres

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14
Q

Arterioles carry…

A

Blood from the medium muscular arteries to the metarterioles (micro circulation)

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15
Q

Structure of arterioles

A

Less than 0.1mm diameter, three layers of smooth muscle cells, no internal elastic lamina, external elastic lamina in larger arterioles

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16
Q

Metarterioles supply…

A

Blood to capillary beds

17
Q

Metarterioles structure

A

Intermediate rings of smooth muscle (precapillary sphincters) - control blood flow

18
Q

Precapillary sphincters are important in…

A

Tissue perfusion

19
Q

Tissue perfusion is…

A

The relaxation of precapillary sphincters in metarterioles to allow blood more easily in certain areas of the body

20
Q

Capillaries consist of…

A

One endothelial layer and it’s concordat basement membrane

21
Q

Types of capillaries

A

Continuous, fenestrated and sinusoidal

22
Q

What can leave continuous capillaries?

A

Water and ions

23
Q

What can leave sinusoidal capillaries?

A

Large molecules such as cells and proteins

24
Q

Post capillary venules carry blood from the…

A

Capillaries to the venules

25
Q

Tissue fluid tends to drain into…

A

Post capillary venules as their pressure is lower than the capillaries or tissues

26
Q

Structure of post capillary venules

A

An endothelial lining with associated pedicytes and a diameter of 10-30 micrometers. Permeable walls to allow for leukocyte migration

27
Q

During inflammation (venules)…

A

Pressure of venules is higher than surrounding interstitium, allows fluid to leak out along with white blood cells and cytokines

28
Q

Interstitium meaning

A

Surrounding connective tissue which lies between the cells of an organ

29
Q

Venules carry…

A

Blood from post capillary venules to veins

30
Q

Venule structure

A

Endothelial lining associated with pericytes or smooth muscle cells (the beginning of a tunica media). Diameter of up to 1mm and also contain valves

31
Q

Many venules unite to form

A

Veins

32
Q

Small and medium veins have…

A

A well developed tunica adventitia and thinner tunica media and tunica intima

33
Q

Large veins structure

A

Diameters greater than 10mm, thick tunica intima, longitudinal muscle in the tunica adventitia, smooth circular muscle in the tunica media.

34
Q

Veins contain (v)…

A

Valves to prevent back flow of blood and propel it forward to the heart

35
Q

Venae Comitantes…

A

Are veins wrapped in a sheath with arteries. The pulsations of the artery stimulate the vein to push blood forward

Basics (16 decks)

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