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( Organ (anatomy))
In biology and anatomy, an organ (Latin organum, "instrument, tool", from Greek ???a??? - organon, "organ, instrument, tool") is a collection of tissues joined in structural unit to serve a common function [1]. Usually there is a main tissue and sporadic tissues. The main tissue is the one that is unique for the specific organ. For example, main tissue in the heart is the myocardium, while sporadic are the nerves, blood, connective etc.. Functionally related organs often cooperate to form whole organ systems. Organs exist in all higher biological organisms, in particular they are not restricted to animals, but can also be identified in plants. In single-cell organisms like bacteria, the functional analogues of organs are called organelles. A hollow organ is a visceral organ that is a hollow tube or pouch (as the stomach or intestine) or that includes a cavity (as of the heart or urinary bladder).[2] The functions of organ systems often share significant overlap. For instance, the 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, which involves the relationship between the muscular and skeletal systems.
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Organ (anatomy) Subcategories
Organ (anatomy) Articles
Liver Diseases Treatment India - By Internationally Experienced Surgeons by Pankaj Nagpal
Live Disease – Treatment and Surgery In India
Liver Diseases Including Tests For Viral Profile In Hepatitis & Alcohol Related Problems
Liver problems include a wide range of diseases and conditions that can affect your liver. Your liv...
Dead Skin Cells - Are they a problem? by Dr Danny T. Siegenthaler
About Our Skin The human skin is a complex organ. It consists of several layers, which are involved in a range of functions, ranging from sensory perception, protection from external pathogens to temperature regulation. The skin...
The Penis - Know Your (Or Your Partner's) Anatomy by sacha tarkovsky
The man’s sexual (and excretory) organ, the penis, is not as simple as it may appear. One should know all about his penis, and connected sexual organs, as it plays, in one way or another, an important part in every man’s life.
The Penis Size ...
Calcium, Osteoporosis And Essential Issues Of The Bones by Robert Bell
The skeletal system is the foundational structure of the human anatomy. It is the support system on which every organ, muscle and substance in the body stands upon. Without it, the body will have no form, structure and movement whatsoever. For these ...
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