Alveolar gland

In contrast to tubular glands, in the second main variety of gland, the secretory portion is enlarged and the lumen variously increased in size. These are termed alveolar glands (or saccular glands, or acinar glands, or acinous glands). Some sources draw a clear distinction between acinar and alveolar glands, based upon the shape of the lumen.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. These are termed alveoli.
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B: (Biologi) kelenjar alveolus
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