Blood Vessels

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Veins- Function
To carry blood from tissues to the hear
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Veins - Walls
Thin, mainly collagen, blood at low pressue
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Veins- Lumen
Large to reduce resistant flow
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Vein- Valves
Many to prevent backflow
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Veins- Blood
Dexoygenated and at a low pressure
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Capillaries- Function
Allow exchange of materials between the blood and the tissues
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Capillaries- Walls
Very thin, permeable, only one cell thick to allow for exchange
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Capillaries- Lumen
Very small, blood cells must distort to pass through
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Capillaries- Valves
None
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Capillaries- Blood
Pressure falls, changes from oxygenated to deoxygenated
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Arteries- Function
Carry the blood from the heart to the tissues
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Arteries- Walls
Thick with smooth elastic layers to resist high pressure, muscle layer to aid pumping
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Arteries- Lumen
Small
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Arteries- Valves
No valves except in heart
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Arteries- Blood
At a high pressure, usually oxygenated except from Pulmonary artery
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Other cards in this set

Card 2

Front

Thin, mainly collagen, blood at low pressue

Back

Veins - Walls

Card 3

Front

Large to reduce resistant flow

Back

Preview of the back of card 3

Card 4

Front

Many to prevent backflow

Back

Preview of the back of card 4

Card 5

Front

Dexoygenated and at a low pressure

Back

Preview of the back of card 5
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