Alveolar gland

Alveolar gland
Section of pancreas of dog. X 250.
Identifiers
THH2.00.02.0.03028
Anatomical terminology
Look up alveolar in Wiktionary, the free dictionary.
Look up tubuloalveolar in Wiktionary, the free dictionary.

Alveolar glands, also called saccular glands, are glands with a saclike secretory portion, in contrast with tubular glands. They typically have an enlarged lumen (cavity), hence the name: they have a shape similar to alveoli, the very small air sacs in the lungs.

Some sources draw a clear distinction between acinar and alveolar glands, based upon the size of the lumen.[1] A further complication in the case of the alveolar glands may occur in the form of still smaller saccular diverticuli growing out from the main sacculi.

The term "racemose gland"[2] is used to describe a "compound alveolar gland" or "compound acinar gland."[3]

Branched alveolar glands are classified as follows:

Type Description Location
simple branched acinar
 thyroid glands
tubuloalveolar
or tubulo-alveolar
or tubulo-acinar
or compound tubulo-acinar
or compound tubuloalveolar[4] 		glands that start out as simple branched tubular, and branch further to terminate in alveoli salivary glands,[5]
esophagus[6]
mammary glands


Additional images

  • Alveoli of lacrimal gland.
    Alveoli of lacrimal gland.
  • Human submaxillary gland. At the right is a group of mucous alveoli, at the left a group of serous alveoli.
    Human submaxillary gland. At the right is a group of mucous alveoli, at the left a group of serous alveoli.
  • Section of portion of breast tissue.
    Section of portion of breast tissue.

See also

References

  1. ^ Classification of Exocrine Glands
  2. ^ Racemose+gland Archived 2012-10-13 at the Wayback Machine at eMedicine Dictionary
  3. ^ SIU SOM Histology GI
  4. ^ Histology at KUMC glands-glands17
  5. ^ Histology at KUMC glands-glands14 "Compound Tubulo- Alveolar"
  6. ^ MedEd at Loyola histo/practical/epithelium/hp1-28.html


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