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The traditional preparation caused mucous cells to swell during fixation which results in the serous cells being popped out of their alignment. 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 ...
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.
An acinus (/ ˈ æ s ɪ n ə s /; pl.: acini; adjective, acinar / ˈ æ s ɪ n ər / or acinous) refers to any cluster of cells that resembles a many-lobed "berry", such as a raspberry (acinus is Latin for "berry").
Mucoserous acini (singular acinus) or mixed acini are mainly present in submandibular and sublingual 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
Each acinus consists of a single layer of cuboidal epithelial cells surrounding a lumen, a central opening where the saliva is deposited after being produced by the secretory cells. The three forms of acini are classified in terms of the type of epithelial cell present and the secretory product being produced - serous, mucoserous, and mucous.
Acinar cells are stimulated by cholecystokinin (CCK), which is a hormone/neurotransmitter produced by the intestinal cells (I cells) in the duodenum. CCK stimulates production of the pancreatic zymogens. Pancreatic juice, composed of the secretions of both ductal and acinar cells, contains the following digestive enzymes: [11]
Acinetobacter is a genus of Gram-negative bacteria belonging to the wider class of Gammaproteobacteria. Acinetobacter species are oxidase-negative, exhibit twitching motility, [7] and occur in pairs under magnification.
PaSCs are located within the peri-acinar spaces of the pancreas and extrude long cytoplasmic processes that surround the base of the acinus. [2] PaSCs compose 4% of the total cell mass in the gland [4] Stellate cells derive their name from their star shape and are located in other organs such as the kidney and lungs. [2]