Organ

Collection of tissues joined as a structural unit that serves a common function
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alias
organs
Foundational Model of Anatomy ID
67498
named as
Organ
media
properties for this type
arterial_supply
innervated_by
venous_drainage
Commons category
Organ systems
Wikipedia creation date
11/28/2002
Wikipedia incoming links count
Wikipedia opening text
An organ is a group of tissues with similar functions. Plant life and animal life rely on many organs that coexist in organ systems. A given organ's tissues can be broadly categorized as parenchyma, the tissue peculiar to (or at least archetypal of) the organ and that does the organ's special job, and stroma, the tissues with supportive, structural, connective, or ancillary functions. For example, in a gland, the tissue that makes the hormones is the parenchyma, whereas the stroma includes the nerves that innervate the parenchyma, the blood vessels that oxygenate and nourish it and carry away its metabolic wastes, and the connective tissues that provide a suitable place for it to be situated and anchored. The main tissues that make up an organ tend to have common embryologic origins, such as arising from the same germ layer. Functionally related organs often cooperate to form whole organ systems. Organs exist in most multicellular organisms. In single-celled organisms such as bacteria, the functional analogue of an organ is known as an organelle. In plants, there are three main organs. A hollow organ is an internal organ that forms a hollow tube, or pouch such as the stomach, intestine, or bladder. In the study of anatomy, the term viscus refers to an internal organ. Viscera is the plural form. The number of organs in any organism depends on which precise definition of the term one uses. By one widely used definition, 79 organs have been identified in the human body.
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Internal organ
Hollow organ
Visceral organ
Organs
Organ (biology)
Visceral
Vital organ
Internal organs
Organic system
Viscera
Vicera
Vital organs
Plant organs
Innervation of viscera
Innervation of the viscera
Viscera innervation
Visceral innervation
Pelvic viscera
Thoracic viscera
Visceras
Thoracic visceras
Plant organ
Abdominal viscus
Visceral organs
Organomics
Organs (anatomy)
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