organ subunit

organ region with fixed fiat boundary

A part of an organ that constitutes a distinct modular sub-unit. In some cases, the organ may also contain other sub-units of identical or similar types, in other cases this may be a distinct entity.

Tipo Organ
Estructura principal organ part
Nombre latino organ region with fixed fiat boundary
FMA ID 86140

Subestructuras

ocular surface region Gland glans Organ pilosebaceous unit Muscle sac of scrotum Organ sallet Organ segmental subdivision of nervous system Bone skin appendage follicle Organ anterior segment of eyeball Organ bronchopulmonary segment Organ chamber of eyeball Organ cloacal bursa Organ renal corpuscle Organ lesser sac Organ posterior segment of eyeball Organ tooth crown Organ costal diaphragm Bone crus of diaphragm Bone kidney calyx Organ metabolic zone of liver Organ tooth root Bone vertebra lamina Bone duct Organ

Preguntas frecuentes

What is an organ subunit and how does it relate to the whole organ?
An organ subunit is a distinct modular component that constitutes a functional and structural subdivision within an organ. Organ subunits may be repeated units — for example, the nephron in the kidney, the liver lobule in the liver, or the pulmonary lobule in the lung — where multiple identical subunits execute the organ's function in parallel. Alternatively, an organ may contain distinct, non-identical subunits like the cortex and medulla of the adrenal gland, each performing different functions.
What are examples of well-known organ subunits?
Key examples include: the nephron (functional subunit of the kidney, each containing glomerulus, tubules, and collecting duct — approximately one million per human kidney), the hepatic lobule (hexagonal subunit of the liver organized around a central vein), the pulmonary alveolus (gas-exchange subunit of the lung), the ovarian follicle (reproductive subunit of the ovary), and the seminiferous tubule (sperm-producing subunit of the testis). Each represents a modular repeating unit that collectively creates organ function.
Why is the concept of organ subunit important in medicine and physiology?
Understanding organ subunits is critical because many diseases operate at the subunit level. Glomerulonephritis damages nephrons selectively while leaving surrounding kidney tissue intact. Hepatic cirrhosis disrupts the lobular architecture of the liver. Pulmonary fibrosis damages alveolar subunits. Quantifying surviving functional subunits (e.g., nephron number, hepatocyte mass) is essential for assessing organ reserve and predicting disease trajectory.

Estructuras relacionadas

mucus body coating mucous body coating mucus cocoon mucous cocoon Mullerian duct ductus paramesonephricus multi cell part structure cell part cluster multicellular anatomical structure multicellular structure multilaminar epithelium laminated epithelium multi-tissue structure multi-tissue structures multi-unit eye

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.