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Each caecum consists of three regions. The distal zone is formed of embryonic cells having a high nuclear to cytoplasmic ratio and giving rise to the other cell types. The second or differentiation zone consists of regular tall columnar cells of two morphological types:(1) light staining R\u2010cells which have a large number of lipid droplets and few Golgi bodies; (2) basophilic F\u2010cells which have numerous distended Golgi bodies. The more proximal secretory zone forms the majority of each diverticulum. This mature zone is formed from R\u2010cells and large, basophilic, vacuolated B\u2010cells which differentiate from F\u2010cells. The secretory cell sequence appears to be E\u2010cell \u2014 F\u2010cell \u2014 B\u2010cell with secretion being apocrine in nature. The exact relationship of Rcells to the other cell types is questionable, but the R\u2010, F \u2010 and B\u2010cells all appear to be able to absorb and store nutrients. Within the Malacostraca the hepatopancreatic epithelium of Amphipoda more closely approximates that of Decapoda than that of the Isopoda.<\/jats:p>","DOI":"10.1002\/jmor.1051490307","type":"journal-article","created":{"date-parts":[[2005,2,24]],"date-time":"2005-02-24T18:54:15Z","timestamp":1109271255000},"page":"383-399","source":"Crossref","is-referenced-by-count":33,"title":["The ultrastructure of the hepatopancreatic caeca of <i>Gammarus minus<\/i> (crustacea, amphipoda)"],"prefix":"10.1002","volume":"149","author":[{"given":"Terry W.","family":"Schultz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,2,6]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"392","article-title":"Estimation of cellulase in the ventral caeca of Orchestia gammarella Pallas","volume":"30","author":"Agrawal V. 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