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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
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]
Human submandibular gland. At the right is a group of mucous acini, at the left a group of serous acini. Lobes contain smaller lobules, which contain adenomeres, the secretory units of the gland. Each adenomere contains one or more acini, or alveoli, which are small clusters of cells that secrete their products into a duct.
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.
They are formed by mucous cells with some serous cells interspersed each other. Both cells pour their secretion directly in the lumen . Layer of mucous cells and serous demilune of serous cells superficial to mucous cells
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.
The sublingual gland (glandula sublingualis) is a seromucous polystomatic exocrine gland.Located underneath the oral diaphragm (diaphragma oris), the sublingual gland is the smallest and most diffuse of the three major salivary glands of the oral cavity, with the other two being the submandibular and parotid.