This image was obtained with a 60x oil immersion objective from MH 094. The increased resolution is helpful in viewing secretory cells and ducts of the parotid.
The minimal functional unit of the parotid is a lobule defined by a thin layer of connective tissue.
Serous Cells (#1 and #2) - arranged as acini of pyramidal serous cells. These polarized cells have rough endoplasmic reticulum (RER) at their base (basophilic) and secretion granules (eosinophilic) at their apex
Mucous Cells - polarized cells with flattened nuclei at the bottom of the cells. These are very lightly stained with a "foamy" appearance (mucous has been extracted).
Intralobular Ducts - two types are found within lobules:
Intercalated Ducts (#1, #2 and #3)
- the smallest ducts that insert into and drain individual acini. They are more lightly stained than acini cells and are low cuboidal.
Striate Ducts - arise from intercalated ducts. They are columnar with basal striations and are surrounded by capillaries.