Arteries

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An artery is a blood vessel which carries [[Blood|blood]] away from the [[Heart|heart]]. It is the largest of all types of blood vessel, with strong vascular walls, the strength of which is required to move blood to body tissues which require [[Oxygen|oxygen]].  
 
An artery is a blood vessel which carries [[Blood|blood]] away from the [[Heart|heart]]. It is the largest of all types of blood vessel, with strong vascular walls, the strength of which is required to move blood to body tissues which require [[Oxygen|oxygen]].  
  
[[Arterioles|Aterioles are]] small branches of arteries, and control the blood which is sent to [[Capillary|capillaries]]. These are an important part of the arterial system&nbsp;<ref>Guyton, A. and Hall, J. (2011) Textbook of Medical Physiology, 12th edition. Philadelphia: Saunders Elsevier</ref>.
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[[Arterioles|Aterioles are]] small branches of arteries, and control the blood which is sent to [[Capillary|capillaries]]. These are an important part of the arterial system&nbsp;<ref>Guyton, A. and Hall, J. (2011) Textbook of Medical Physiology, 12th edition. Philadelphia: Saunders Elsevier</ref>.  
  
 
=== Structure  ===
 
=== Structure  ===
  
The outer layer of an artery is called the tunica adventitia, which comes into contact with surrounding [[Organ|organs]] in order to protect the artery from wear. The inner layer is called a tunica intima has a smooth [[Epithelium|epithelium]] so that friction is reduced which is caused by blood flowing through the artery. The tunica media is the thickest layer and contains [[Smooth muscle|smooth muscle]] for [[Muscle contraction|contraction]], to allow blood to flow through the artery&nbsp;<ref>Rowland, M. (1992) Biology. Surrey: Thomas Nelson and Sons Ltd.</ref>.
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The outer layer of an artery is called the tunica adventitia, which comes into contact with surrounding [[Organ|organs]] in order to protect the artery from wear. The inner layer is called a tunica intima has a smooth [[Epithelium|epithelium]] so that friction is reduced which is caused by blood flowing through the artery. The tunica media is the thickest layer and contains [[Smooth muscle|smooth muscle]] for [[Muscle contraction|contraction]], to allow blood to flow through the artery&nbsp;<ref>Rowland, M. (1992) Biology. Surrey: Thomas Nelson and Sons Ltd.</ref>.  
  
In the heart, there are two main arteries; the pulmonary artery and the aorta. The pulmonary artery carries deoxygenated blood to the [[Lungs|lungs]] to become oxygenated (using [[Haemoglobin|haemoglobin]]) to bind [[Oxygen|oxygen]].  
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In the heart, there are two main arteries; the pulmonary artery and the aorta. The pulmonary artery carries deoxygenated blood to the [[Lungs|lungs]] to become oxygenated (using [[Haemoglobin|haemoglobin]]) to bind [[Oxygen|oxygen]]. [[Image:Artery_med.jpg|right|380x219px]]
  
The aorta is the largest artery in the body and rises from the left ventricle of the [[Heart|heart]], carrying oxygenated [[Blood|blood]] which can then be used in [[Respiration|respiration]]. <br>  
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The aorta is the largest artery in the body and rises from the left ventricle of the [[Heart|heart]], carrying oxygenated [[Blood|blood]] which can then be used in [[Respiration|respiration]]. <br>
  
 
=== References  ===
 
=== References  ===
  
 
<references />
 
<references />

Revision as of 00:30, 6 December 2017

An artery is a blood vessel which carries blood away from the heart. It is the largest of all types of blood vessel, with strong vascular walls, the strength of which is required to move blood to body tissues which require oxygen.

Aterioles are small branches of arteries, and control the blood which is sent to capillaries. These are an important part of the arterial system [1].

Structure

The outer layer of an artery is called the tunica adventitia, which comes into contact with surrounding organs in order to protect the artery from wear. The inner layer is called a tunica intima has a smooth epithelium so that friction is reduced which is caused by blood flowing through the artery. The tunica media is the thickest layer and contains smooth muscle for contraction, to allow blood to flow through the artery [2].

In the heart, there are two main arteries; the pulmonary artery and the aorta. The pulmonary artery carries deoxygenated blood to the lungs to become oxygenated (using haemoglobin) to bind oxygen.
Artery med.jpg

The aorta is the largest artery in the body and rises from the left ventricle of the heart, carrying oxygenated blood which can then be used in respiration.

References

  1. Guyton, A. and Hall, J. (2011) Textbook of Medical Physiology, 12th edition. Philadelphia: Saunders Elsevier
  2. Rowland, M. (1992) Biology. Surrey: Thomas Nelson and Sons Ltd.
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