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27,815. determine 2. Epithelial junction. Zonula occludens. Human. Electron microscopy. ×83,700. This electron micrograph represents a skinny part of an intercellular canaliculus among transparent cells of a human eccrine sweat gland stained with ferrocyanide-reduced osmium tetroxide. a good junction (arrows) separates the lumen of the intercellular canaliculus (IC) from the basolateral intercellular house. notice the nucleus (N). (From Briggman JV, financial institution HL, Bigelow JB, Graves JS, Spicer SS. constitution of the tight junctions of the human eccrine sweat gland. Am J Anat 1981;162:357–368. ) this can be a freeze fracture reproduction of an tricky tight junction alongside an intercellular canaliculus among transparent cells. be aware the sleek transition from a sector of wavy, nonintersecting, densely packed junctional parts to a space of complicated anastomoses. on the step fracture (arrows), it may be noticeable that the trend of ridges at the E-face corresponds to that of the grooves at the P-face of the plasma membrane of the adjoining transparent mobile. In definite components (arrowheads), a number of of the laterally disposed, densely packed junctional parts are separated from the luminal band. The path of platinum shadowing is indicated through the turned around arrow. (From Briggman JV, financial institution HL, Bigelow JB, Graves JS, Spicer SS. constitution of the tight junctions of the human eccrine sweat gland. Am J Anat 1981;162:357–368. ) Zonulae occludentes Gartner & Hiatt_Chap02. indd 50 11/14/2012 9:03:22 PM PLATE 2-4 • Epithelial Junctions, Electron Microscopy determine 1 determine 2 Gartner & Hiatt_Chap02. indd fifty one 11/14/2012 9:03:22 PM 52 EPITHELIUM AND GLANDS PLATE 2-5 • Glands determine 1. Goblet cells. Ileum. Monkey. Plastic part. ×270. determine 2. Goblet cells. Ileum. Monkey. Plastic part. ×540. Goblet cells are unicellular exocrine glands which are chanced on interspersed between uncomplicated columnar and pseudostratiﬁed columnar epithelia. This photomicrograph of an ileal villus monitors various goblet cells (GC) positioned one of the uncomplicated columnar epithelial cells (EC). the comb border (arrowhead) of the columnar cells is just scantly current at the goblet cells. The improved apical zone of the goblet telephone is named the theca (T) and is ﬁlled with mucin (m), which, while published into the lumen of the intestine, coats and protects the intestinal lining. The reduce right-hand nook of the straightforward columnar epithelium was once sectioned a bit of obliquely in the course of the nuclei of the epithelial cells, generating the looks of a stratiﬁed epithelium (asterisk). the epithelium above the double arrows, in spite of the fact that, it truly is in actual fact easy columnar. The occasional around nuclei (rN) are these of lymphocytes migrating throughout the epithelium into the lumen (L). determine 2 is the next magniﬁcation of the boxed zone. This photomicrograph is a better magniﬁcation of the boxed quarter of the former ﬁgure, demonstrating the sunshine microscopic morphology of the goblet mobile. The mucin (m) within the improved theca (T) of the goblet mobilephone has been in part brought on and dissolved throughout the dehydration strategy.