Acinus

An acinus (/ˈæsɪnəs/; plural, acini; adjective, acinar /ˈæsɪnər/ or acinous) refers to any cluster of cells that resembles a many-lobed "berry," such as a raspberry (acinus is Latin for "berry"). The berry-shaped termination of an exocrine gland, where the secretion is produced, is acinar in form, as is the alveolar sac containing multiple alveoli in the lungs.

For the acinus in the lung, see Lung § Microanatomy.
Acinus
Illustrated section of pancreas of dog. X 250. (Alveolus labeled at center top.)
Centroacinar cells
Identifiers
THH2.00.02.0.03050
Anatomical terminology
human acinar cells

Exocrine glands

Acinar exocrine glands are found in many organs, including:

The thyroid follicles can also be considered of acinar formation but in this case the follicles, being part of an endocrine gland, act as a hormonal deposit rather than to facilitate secretion.
Mucous acini usually stain pale, while serous acini usually stain dark.
The term "acinus" is considered synonymous with alveolus by some sources, but not all.

Lungs

The end of the respiratory bronchioles in the lungs mark the beginning of a pulmonary acinus that includes the alveolar ducts, alveolar sacs, and alveoli.[4]

gollark: While you're here, consider some x where x^2 mod 384 = 8.3. Continue considering it. This is NOT to distract you.
gollark: So they should line up.
gollark: "Bad" inasmuch as you were seemingly saying that "balanced" outcomes were always the "good" ones earlier.
gollark: I don't see why you would want more disease unless:- you value human suffering or some adjacent thing- you think it would reduce total disease over time, which is irrelevant if you just entirely wipe it out with technology™- you value "balance" or something as a goal in itself, which seems bad
gollark: Also vaguely patronising I think, but hard to tell.

See also

References
  1. Histology image: 51_07 at the University of Oklahoma Health Sciences Center - pyloric stomach
  2. Histology image: 46_03 at the University of Oklahoma Health Sciences Center - sublingual gland
  3. Histology image:10405loa from Vaughan, Deborah (2002). A Learning System in Histology: CD-ROM and Guide. Oxford University Press. ISBN 978-0195151732.
  4. Weinberger, Steven (2019). Principles of Pulmonary Medicine. Elsevier. p. 2. ISBN 9780323523714.


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