Elementary anatomy and physiology Elementary anatomy and physiology : for colleges, academies, and other schools elementaryanato00hitc Year: 1869 37G HITCHCOCK'S ANATOMY Fia- 349• fluid is uniformly distributed over the whole ball of the eye, and the excess is carried away from the eye by the two lachrymal canals, which commence at the two little projections near the inner angle of each lid of the eye, appearing like minute black specks. Both of these very soon unite into a larger tube called the nasal duct, (Fig. 349,) which descends inwardly and empties itself upon the nostrils. 689. Ey
Elementary anatomy and physiology Elementary anatomy and physiology : for colleges, academies, and other schools elementaryanato00hitc Year: 1869 37G HITCHCOCK'S ANATOMY Fia- 349• fluid is uniformly distributed over the whole ball of the eye, and the excess is carried away from the eye by the two lachrymal canals, which commence at the two little projections near the inner angle of each lid of the eye, appearing like minute black specks. Both of these very soon unite into a larger tube called the nasal duct, (Fig. 349,) which descends inwardly and empties itself upon the nostrils. 689. Eyebrows.—The Eyebrows are projecting arches of fat and skin, cov- ered with short and thick hairs which encircle the upper portion of the eye. They are provided with muscles, so that they can be made to shade the eye more or less perfectly, as ne- cessity may require. 630. Eyelids,—The Eyelids are movable membranous and mus- cular coverings which are placed directly up- on the eyeball, and are designed for protective organs against mechanical violence and too powerful light. Their free edges are called Tarsal Carti- Where are the lachrymal canals and what do they carry? What is the nasal duct? 689. Describe the eyebrows. 690. What are the eyelids ? What are their edges made up of? What glands directly in them ? Lachrymal Canals. 1, Puncta Lachry- malia. 2, Cul-de-Sac at the Orbital End of the Canal. 3, Course of each Canal to the Saccus Lacrymalis. 4, 5, Saccus La- cry mal is. 6, Lower Part of the Ductus ad Nasum. Fig. 350.
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