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Alveolar gland

Alveolar gland
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Identifiers
Code TH H2.00.02.0.03028
Dorlands
/Elsevier
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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.

Branched alveolar glands are classified as follows:

Type Description Location
120px simple branched acinar
120px tubuloalveolar
or tubulo-alveolar
or tubulo-acinar
or compound tubulo-acinar
or compound tubuloalveolar[1]
glands that start out as simple branched tubular, and branch further to terminate in alveoli salivary glands,[2]
esophagus[3]
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]

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See also

References


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