Parenchyma
Parenchyma (.
Etymology
The term parenchyma is Neo-Latin from the Ancient Greek word παρέγχυμα parenchyma meaning 'visceral flesh', and from παρεγχεῖν parenkhein meaning 'to pour in' from παρα- para- 'beside' + ἐν en- 'in' + χεῖν khein 'to pour'.[3]
Originally, Erasistratus and other anatomists used it to refer to certain human tissues.[4] Later, it was also applied to plant tissues by Nehemiah Grew.[5]
Structure
The parenchyma is the functional parts of an
Brain
The brain parenchyma refers to the functional tissue in the
Lungs
Lung parenchyma is the substance of the lung that is involved with gas exchange and includes the pulmonary alveoli.[8]
Liver
The liver parenchyma is the functional tissue of the organ made up of around 80% of the liver volume as hepatocytes. The other main type of liver cells are non-parenchymal. Non-parenchymal cells constitute 40% of the total number of liver cells but only 6.5% of its volume.[9]
Kidneys
The
Tumors
The tumor parenchyma, of a solid tumour, is one of the two distinct compartments in a solid tumour. The parenchyma is made up of neoplastic cells. The other compartment is the stroma induced by the neoplastic cells, needed for nutritional support and waste removal. In many types of tumour, clusters of parenchymal cells are separated by a basal lamina that can sometimes be incomplete.[12]
Flatworms
Parenchyma is the tissue made up of cells and intercellular spaces that fills the interior of the body of a
References
- ^ "Parenchyma". Merriam-Webster.com Dictionary. Retrieved 2016-01-21.
- ^ "Parenchyma". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 2020-03-22.
- ISBN 978-1-4860-1440-8. Archivedfrom the original on 2015-11-30. Retrieved 2015-05-21.
- ^ Virchow, R.L.K. (1863). Cellular pathology as based upon physiological and pathological histology [...] by Rudolf Virchow. Translated from the 2nd ed. of the original by Frank Chance. With notes and numerous emendations, principally from MS. notes of the author. 1–562. [Cf. p. 339.] link Archived 2021-04-27 at the Wayback Machine.
- ^ Gager, C. S. 1915. The ballot for names for the exterior of the laboratory building, Brooklyn Botanic Garden. Rec. Brooklyn Bot. Gard. IV, pp. 105–123. link Archived 2017-11-10 at the Wayback Machine.
- ^ "What is the Brain Parenchyma? (With pictures)". Archived from the original on 2016-01-05. Retrieved 2015-12-28.
- PMID 34183986.
- PMID 23733644.
- PMID 11729749.
- S2CID 208553793.
- ISBN 978-1-4160-2328-9.
- ^ Connolly, James L.; Schnitt, Stuart J.; Wang, Helen H.; Longtine, Janina A.; Dvorak, Ann; Dvorak, Harold F. (2003). "Tumor Structure and Tumor Stroma Generation". Holland-Frei Cancer Medicine. 6th edition. Archived from the original on 2020-12-19. Retrieved 2019-10-01.
- JSTOR 3226561.
External links
- The dictionary definition of parenchyma at Wiktionary