In higher animals, organs are grouped into organ systems; e. In the more advanced animals, there are usually 1. These systems appear gradually in the lower animals and attain their full complexity and functional specialization in the higher animals.
![Organ [1965] Organ [1965]](http://upload.wikimedia.org/wikipedia/commons/6/69/Pipe.organ.console.arp.jpg)
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In biology, an organ or viscus is a collection of tissues joined in a structural unit to serve a common function. In anatomy, a viscus (/ Organ definition, Also called pipe organ.
IRODaT is The International Registry on Organ Donation and Transplantation. It is a database that provides worldwide information by country on donation and transplantation activity. Vita, Termine/Events, News, Video, Kontakt /
![Organ [1965] Organ [1965]](http://www.washington.edu/news/files/2012/10/Terry_Organ_Oct25.jpg)
In plants the primary organs are the stem, root, and leaf, all of which help to nourish the plant, and the reproductive organs (e. As with animals, these organs are responsible for the basic life- sustaining functions of the organism.
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Organ meaning, definition, what is organ: a part of the body of an animal or plant that performs a particular job.
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