From: Animal Model for the Absorption of Lipophilic Substances from Tear Fluid by the Epithelium of the Nasolacrimal Ducts Invest. Ophthalmol. Vis. Sci.. 2002;43(10):3137-3143. Figure Legend: (A) Horizontal section through the nasolacrimal duct of a rat. A surrounding cavernous body is absent. (B) Higher magnification of the lining epithelium of the rat nasolacrimal duct with large squamous cells at the epithelial surface and cuboid cells in deeper epithelial layers. Goblet cells are integrated as mucous glands in the epithelium (i). (C) Horizontal section of a nasolacrimal duct from a cat. The lumen is surrounded by strong connective tissue in which some blood vessels are visible. However, a surrounding cavernous body is absent. (D) Higher magnification of Figure 1C revealing the lining epithelium of the nasolacrimal duct. The pseudostratified columnar epithelium contains many goblet cells (g). (E) Horizontal section through the nasolacrimal duct of a deer. The lumen of the lacrimal passage (l) is surrounded by a cavernous body rich in blood vessels with wide lumina ( ). (F) Higher magnification of Figure 1E revealing a pseudostratified columnar epithelium without goblet cells. (G) Horizontal section through the nasolacrimal duct of a pig. The lumen (l) of the lacrimal passage is surrounded by a cavernous body rich in blood vessels with wide lumina ( ). The lamina propria contains many seromucous glands (arrows). (H) Higher magnification of Figure 1G . The duct contains a pseudostratified columnar epithelium without goblet cells. All sections: Goldner staining. Magnification: (A, E, G) ×30; (B, D, F, H) ×372; (C) ×59. Date of download: 10/25/2017 The Association for Research in Vision and Ophthalmology Copyright © 2017. All rights reserved.