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{{redirect| |
{{redirect|Organ||Organ (disambiguation)|}} |
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{{redirect|Viscera}} |
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{{TAFI}} |
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{{Infobox anatomy |
{{Infobox anatomy |
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|Name = Organ |
|Name = Organ |
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|Image = Leber Schaf.jpg |
|Image = Leber Schaf.jpg |
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|Caption = The [[liver]] of a sheep. The liver is one of the main organs in the body. |
|Caption = The [[liver]] and [[gallbladder]] of a sheep seen from behind. The liver is one of the main organs in the body. |
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In [[biology]], an '''organ''' or '''viscus''' is a collection of [[Tissue (biology)|tissues]] joined in a structural unit to serve a common [[Function (biology)|function]].<ref>{{cite book |
In [[biology]], an '''organ''' or '''viscus''' is a collection of [[Tissue (biology)|tissues]] joined in a structural unit to serve a common [[Function (biology)|function]].<ref>{{cite book |
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== Organ systems == |
== Organ systems == |
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{{main|Biological system}} |
{{main|Biological system}} |
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{{See also| |
{{See also|Human body}} |
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Two or more organs working together in the execution of a specific body function form an organ system, also called a [[biological system]] or body system. The functions of organ systems often share significant overlap. For instance, the [[nervous system|nervous]] and [[endocrine system]] both operate via a shared organ, the [[hypothalamus]]. For this reason, the two systems are combined and studied as the [[neuroendocrine system]]. The same is true for the [[musculoskeletal system]] because of the relationship between the [[muscular system|muscular]] and [[skeletal system|skeletal]] systems. |
Two or more organs working together in the execution of a specific body function form an organ system, also called a [[biological system]] or body system. The functions of organ systems often share significant overlap. For instance, the [[nervous system|nervous]] and [[endocrine system]] both operate via a shared organ, the [[hypothalamus]]. For this reason, the two systems are combined and studied as the [[neuroendocrine system]]. The same is true for the [[musculoskeletal system]] because of the relationship between the [[muscular system|muscular]] and [[skeletal system|skeletal]] systems. |
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The term "visceral" is contrasted with the term "{{linktext|parietal}}", meaning "of or relating to the wall of a body part, organ or cavity".{{fact|date=May 2015}} The two terms are often used in describing a membrane or piece of connective tissue, referring to the opposing sides.{{fact|date=May 2015}} |
The term "visceral" is contrasted with the term "{{linktext|parietal}}", meaning "of or relating to the wall of a body part, organ or cavity".{{fact|date=May 2015}} The two terms are often used in describing a membrane or piece of connective tissue, referring to the opposing sides.{{fact|date=May 2015}} |
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===Seven Vital Organs of Antiquity=== |
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Some alchemists (e.g. [[Paracelsus]]) adopted the [[Hermetic Qabalah]] assignment between the |
Some alchemists (e.g. [[Paracelsus]]) adopted the [[Hermetic Qabalah]] assignment between the seven vital organs and the seven [[classical planets]] as follows:<ref name="BallParacelsus">Philip Ball, ''The Devil's Doctor: Paracelsus and the World of Renaissance Magic and Science'', ISBN 978-0-09-945787-9{{pn|date=May 2015}}</ref> |
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{{Portal bar|Biology|Medicine}} |
{{Portal bar|Biology|Medicine}} |
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{Authority control} |
{{Authority control}} |
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[[Category:Organ systems| ]] |
[[Category:Organ systems| ]] |
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[[Category:Organs (anatomy)| ]] |
[[Category:Organs (anatomy)| ]] |