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After sectioning the serous cells resembled the common demilune shape, and were so named. [2] When the gland has this demilunar structure, it has mucoserous acini producing both serous and mucous secretions. Slice of submandibular gland. H&E staining, the structure of the red stained cytoplasm on the left is the serous demilunes.
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
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.
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.
Myoepithelial cells are true epithelial cells positive for keratins, not to be confused with myofibroblasts which are true mesenchymal cells positive for vimentin.These cells are generally positive for alpha smooth muscle actin (αSMA), cytokeratin 5/6 and other high molecular weight cytokeratins, p63 and caldesmon.
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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]