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Serous demilunes, also known as Crescents of Giannuzzi or Demilunes of Heidenhain, are cellular formations in the shape of a half-moon (hence the name "demilune") on the mixed submandibular and sublingual salivary glands. [1] Serous demilunes are the serous cells at the distal end of mucous acini, the secretory endpieces of certain salivary ...
Further, because the secretory cells are of both serous and mucous types, the submandibular gland is a mixed gland, and though most of the cells are serous, the exudate is chiefly mucous. It has long striated ducts and short intercalated ducts. [7] The secretory acinar cells of the submandibular gland have distinct functions.
Salivary glands can be classified as serous, mucous, or seromucous (mixed). In serous secretions, the main type of protein secreted is alpha-amylase, an enzyme that breaks down starch into maltose and glucose, [2] whereas in mucous secretions, the main protein secreted is mucin, which acts as a lubricant. [1]
Demilune, demi-lune, or similar, may refer to: Semicircle shape A half-moon, the first quarter or last quarter lunar phase; Semicircular bund, a rainwater harvesting technique in arid areas; Ravelin, a type of fortification also called demi-lune; Serous demilune (Demilunes of Heidenhain), the crescent shaped formations on salivary glands
Giuseppe Oronzo Giannuzzi. Giuseppe Oronzo Giannuzzi (March 16, 1838, Altamura, Kingdom of the Two Sicilies – March 8, 1876, Siena, Italy) was an Italian physiologist.. His most important discovery is one of the serous demilunes, or crescents: cellular formations that are on some submaxillary salivary glands.
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They contain serous acini, a grouping of serous cells that secrete serous fluid, isotonic with blood plasma, that contains enzymes such as alpha-amylase. Serous glands are most common in the parotid gland and lacrimal gland but are also present in the submandibular gland and, to a far lesser extent, the sublingual gland.
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