Alveolar gland

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Alveolar gland
Gray1105.png
Section of pancreas of dog. X 250.
Identifiers
Code TH H2.00.02.0.03028
Dorlands
/Elsevier
g_06/12391106
Anatomical terminology

If glands are categorized by shape, alveolar glands contrast with tubular glands. Alveolar glands have a saclike secretory portion, thus are also termed saccular glands. They typically have an enlarged lumen (cavity), hence the name similar to alveoli, the smallest air sacs in the lungs.

The term "tubulo-alveolar" (or "tubulo-acinar", or "compound tubulo-acinar", or "compound tubulo-alveolar"[1]) is used to describe glands that start out as branched tubular, and branch further to terminate in alveoli. This type of gland is found in the salivary glands,[2] esophagus,[3] and mammary glands.

Some sources draw a clear distinction between acinar and alveolar glands, based upon the size of the lumen.[4] 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"[5] is used to describe a "compound alveolar gland" or "compound acinar gland".[6]

Additional images[edit]

References[edit]

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