Difference between revisions of "Vein"
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An [[vein]] is a [[blood vessel]] which carries low [[pressure]] [[blood]] to the [[heart]]. | An [[vein]] is a [[blood vessel]] which carries low [[pressure]] [[blood]] to the [[heart]]. | ||
| − | ===Adaptations of | + | ===Adaptations of Veins=== |
: [[Vein]]s have a thin layer of [[muscle]] because the [[blood]] is a low [[pressure]]. | : [[Vein]]s have a thin layer of [[muscle]] because the [[blood]] is a low [[pressure]]. | ||
: [[Vein]]s have few layers of elastic [[tissue]] as the [[blood]] is a low [[pressure]]. | : [[Vein]]s have few layers of elastic [[tissue]] as the [[blood]] is a low [[pressure]]. | ||
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| − | ===About | + | ===About Veins=== |
| − | : Most, but not all, ''' | + | : Most, but not all, '''veins''' carry [[deoxygenated]] [[blood]]. |
Revision as of 16:28, 7 November 2018
Contents
Key Stage 3
Meaning
An vein is a blood vessel which carries blood to the heart.
Key Stage 4
Meaning
An vein is a blood vessel which carries low pressure blood to the heart.
Adaptations of Veins
- Veins have a thin layer of muscle because the blood is a low pressure.
- Veins have few layers of elastic tissue as the blood is a low pressure.
- Veins have valves in them to stop the blood flowing in the wrong direction because it is such a low pressure.
- Veins often pass between muscles which work with the valves by contracting to force the blood through the vein.
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| A diagram of an vein. |
About Veins
- Most, but not all, veins carry deoxygenated blood.