File:Anatomy of the cat (1991) (18194021395).jpg

Title: Anatomy of the cat
Identifier: anatomyofcatrje00reig (find matches)
Year: 1991 (1990s)
Authors: Reighard, Jacob Ellsworth, 1861-1942; Jennings, H. S. (Herbert Spencer), 1868-1947
Subjects: Cats; Mammals
Publisher: (Austin, TX) : BookLab, Inc.
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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THE SKELETON OF THE CAT. bones; its floor by the horizontal plates of the palatines, maxillaries, and premaxillaries. The nasal cavity opens craniacl by the large nares (Fig. 39, /; Fig. 42, r), which are bounded*by the premaxillary and
Text Appearing After Image:
Fig. 43.—Skull, Median Longitudinal Skction, showing the Cavities. /, cerebellar fossa; //, cerebral fossa; ///, olfactory fossa. 1, occipital bone; 2, interparietal; 3, 3', parietal; 4, temporal (4, squamous jiortion; 4', ))etrous portion; 4", tympanic portion); 5, sphenoid; 6, presphenoid; 7. palatine; 8, frontal; 9, max- illary; 10, premaxillary; 11, ethmoid; 12, nasal; 13, incisor teeth; 14, canine; 15, 16, 17, premolars; iS, molar, a, condyloid canal; b, hypoglossal canal; c, jugular foramen; d, internal auditory meatus; c, appendicular fossa; f, tentorium; g, dorsum sella;; //, sella turcica; /, hamular process; /, pterygoid process of sphenoid; k, optic foramen; /, presphenoid sinus; i?i. nt', frontal sinus; 11, lamina perpendicu- laris of the ethmoid (broken at cranial edge). nasal bones. In the natural condition this opening is divided by a median cartilage which is continuous with the lamina per- pendicularis (Fig. 43, n) of the ethmoid, thus forming a parti- tion which divides the nasal cavity into two separate halves. From the floor of the cranial part of the cavity rises a ridge formed of the nasal crests of the maxillaries and premaxillaries, and the cranial portion of the vomer. Farther caudad the vomer spreads out in a horizontal plane and separates from the floor of the cavity, so that the nasal cavity is thereby divided by a horizontal partition into dorsal and ventral jDortions. The ventral portion is small, forming the inferior meatus of the nose; it ends caudally at the choanae (posterior nares, Fig. 41, d) which lead into the nasopharynx. That portion of the nasal cavity lying dorsad of the vomer is almost com-

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