Peristalsis

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This is the movement of circular and longitudinal muscles within some organs. Peristalsis can be seen making a wavelike pattern, extending hollow tubes of organs, to move objects in or out of the system. It mainly occurs in the [[Stomach|stomach]], intestines and [[Esophagus|esophagus]]<ref>(n.d.). Peristalsis. [Online], Available: http://www.britannica.com/EBchecked/topic/452053/peristalsis. Last accessed 29/11/13.</ref>. However, in some organisms, instead of moving a bolus of food, peristaltic wave motion may propel an entire organism. This is the case for [[Earthworm|earthworms]]<ref>(n.d.). Earthworm - Muscular System [Online], Available: http://www.angelfire.com/de2/atoy/mus.htm. Last accessed 29/11/13.</ref>.<br><br>Peristalsis is under the influence of the [[Autonomic_Nervous_System|autonomic nervous system]] and so is involuntary. Depending on the purpose and location, there can be two types of peristaltic waves. One can be a short, local reflex or a long, continuous contraction that spans the entire length of an organ<ref>(n.d.). Peristalsis. [Online], Available: http://www.britannica.com/EBchecked/topic/452053/peristalsis. Last accessed 29/11/13.</ref>. <br>
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This is the movement of circular and longitudinal [[Muscle|muscles]] within some organs. Peristalsis can be seen making a wavelike pattern, extending hollow tubes of organs, to move objects in or out of the system. It mainly occurs in the [[Stomach|stomach]], intestines and [[Oesophagus|oesophagus]]<ref>(n.d.). Peristalsis. [Online], Available: http://www.britannica.com/EBchecked/topic/452053/peristalsis. Last accessed 29/11/13.</ref>. However, in some organisms, instead of moving a bolus of food, peristaltic wave motion may propel an entire organism. This is the case for [[Earthworm|earthworms]]<ref>(n.d.). Earthworm - Muscular System [Online], Available: http://www.angelfire.com/de2/atoy/mus.htm. Last accessed 29/11/13.</ref>.  
  
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Peristalsis is under the influence of the [[Autonomic Nervous System|autonomic nervous system]] and so is involuntary. Depending on the purpose and location, there can be two types of peristaltic waves. One can be a short, local reflex or a long, continuous contraction that spans the entire length of an [[organelle|organ]]<ref>(n.d.). Peristalsis. [Online], Available: http://www.britannica.com/EBchecked/topic/452053/peristalsis. Last accessed 29/11/13.</ref>. <br>  
  
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=== References<br>  ===
  
 
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Latest revision as of 20:54, 4 December 2016

This is the movement of circular and longitudinal muscles within some organs. Peristalsis can be seen making a wavelike pattern, extending hollow tubes of organs, to move objects in or out of the system. It mainly occurs in the stomach, intestines and oesophagus[1]. However, in some organisms, instead of moving a bolus of food, peristaltic wave motion may propel an entire organism. This is the case for earthworms[2].

Peristalsis is under the influence of the autonomic nervous system and so is involuntary. Depending on the purpose and location, there can be two types of peristaltic waves. One can be a short, local reflex or a long, continuous contraction that spans the entire length of an organ[3].

References

  1. (n.d.). Peristalsis. [Online], Available: http://www.britannica.com/EBchecked/topic/452053/peristalsis. Last accessed 29/11/13.
  2. (n.d.). Earthworm - Muscular System [Online], Available: http://www.angelfire.com/de2/atoy/mus.htm. Last accessed 29/11/13.
  3. (n.d.). Peristalsis. [Online], Available: http://www.britannica.com/EBchecked/topic/452053/peristalsis. Last accessed 29/11/13.

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