. Anatomy, descriptive and applied. Anatomy. Fig. 835.—The Meibomian surface of the eyelids. Structure.—In structure and general appearance the lacrimal resembles the serous salivary glands. In the recent state the cells are so crowded with granules that their limits can hardly be defined. Each cell contains an oval nucleus, and the cell protoplasm is finely fibrillated. The Lacrimal Canals (Fig. 837) commence at the minute orifices, puncta lacri- malia, on the summit of small conical elevations, the lacrimal papillae (papillae lacrimalis), seen on the margin of the lids at the outer extremity
. Anatomy, descriptive and applied. Anatomy. Fig. 835.—The Meibomian surface of the eyelids. Structure.—In structure and general appearance the lacrimal resembles the serous salivary glands. In the recent state the cells are so crowded with granules that their limits can hardly be defined. Each cell contains an oval nucleus, and the cell protoplasm is finely fibrillated. The Lacrimal Canals (Fig. 837) commence at the minute orifices, puncta lacri- malia, on the summit of small conical elevations, the lacrimal papillae (papillae lacrimalis), seen on the margin of the lids at the outer extremity of the lacus lacrimalis. The superior canal (ductus lacrimalis superior), the smaller and shorter of the two, at first ascends, and then bends at an acute angle, and passes inward and downward to the ampulla of the lacrimal sac. The inferior canal (ductus lacrimalis inferior) at first descends, and then passes almost horizontally inward to the ampulla. These canals are dense and elastic in structure and somewhat dilated at their angles. The mucous membrane is covered with stratified epithelium upon a basement membrane. Outside the latter is a layer of striped muscle continuous with the Tensor tarsi. The two canals join in a dilatation, the ampulla (ampulla ductus lacrimalis), which empties into the lacrimal sac. The Lacrimal Sac (saccus lacrimalis) (Fig. 837) is the upper dilated extremity of the nasal duct, and is lodged in a deep groove formed by the lacrimal bone and the nasal process of the maxilla bone. It is oval in form, its upper extremity being closed in and rounded, while below it is continued into the nasal duct. It is covered by a fibrous expansion derived from the tendo oculi, and on its deep. oli of lacrimal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gray, Henry, 1825-1861; Sp
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
