. The comparative anatomy of the domesticated animals. Veterinary anatomy. 142 THE EESTIRATOBY APPARATUS IN MAMMALIA. Outer wall,—This is chiefly constituted by the supermaxillary bone, is very rugged, and is divided into three meatuses, or passages, by the turbinated bones—the irregular columns applied against the inner face of the before-mentioned bone. The turbinated hones have already been described, and we will only now refer to the principal features of their organisation. Each is formed of a bony plate rolled upon itself (Fig. 223, 2, 3), and is divided, internally, into two sections, t
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 142 THE EESTIRATOBY APPARATUS IN MAMMALIA. Outer wall,—This is chiefly constituted by the supermaxillary bone, is very rugged, and is divided into three meatuses, or passages, by the turbinated bones—the irregular columns applied against the inner face of the before-mentioned bone. The turbinated hones have already been described, and we will only now refer to the principal features of their organisation. Each is formed of a bony plate rolled upon itself (Fig. 223, 2, 3), and is divided, internally, into two sections, the superior of which forms part of the sinus, and the in- ferior belongs to the nasal fossoB; they are continued, inferiorly, by a fibro- cartilaginous framework, which prolongs their nasal section to the external orifice of the nose. The flexible appendix of the ethmoidal turbinated bone is usually single, sometimes double, and disappears before reaching the alaD of the nose. That of the maxillary turbinated bone is always bifurcated, Fig. TRANSVEBSE SECTION OF THE HEAD OP AN OLD HORSE, SHOWING THE ARRANGEMENT OP THE NASAL CAVITIES AND MOUTH. 1, Nasal fossa; 2, Superior turbinated bone; 3, Inferior ditto; 4, Median septum of the nose; 5, Central part of the buccal cavity (drawn more spacious than it really is when the two jaws are brought together); 6, 6, Lateral portions of the same; 7, Section of the tongue. and its antero-superior branch is directly continued by the superior extremity of the internal wing of the nostril. The meatuses are distinguished into superior, middle, and inferior, or into anterior, middle, and ^posterior, as the head is inspected in a vertical or hori- zontal position. The superior passes along the corresponding border of the ethmoidal turbinated bone, and is confounded with the roof of the nasal cavity; it is prolonged, behind, to near the cribriform plate of the ethmoid. Please note that these images are extracted from scanned page images
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
