. The cat : an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 86 THE CAT. [chap, iil form plate), and in part by the nasal cavity (in front of the cribriform plate). The nasal fossce extend backwards, above the palate, from the anterior to the posterior nares, and are enclosed between the pre- maxillae, maxillae, and palatines, being separated from each other by the median ethmoid and vomer, and, in front of these, by a median cartilage of the nose called " ; The lateral ethmoid projects forwards into each fossa from the cribrif
. The cat : an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 86 THE CAT. [chap, iil form plate), and in part by the nasal cavity (in front of the cribriform plate). The nasal fossce extend backwards, above the palate, from the anterior to the posterior nares, and are enclosed between the pre- maxillae, maxillae, and palatines, being separated from each other by the median ethmoid and vomer, and, in front of these, by a median cartilage of the nose called " ; The lateral ethmoid projects forwards into each fossa from the cribriform plate (cp). The roof of the nasal cavity slopes downwards both anteriorly. Fig. 50.—Longitudinal Vertical Section of Face made a little further off THAN THE MIDDLE LINE. cp. Cribriform plate. et. Lateral ethmoid or ethmo-turbmal. Js. Frontal sinus. int. Maxillo-turbinal. m. Maxilla. p. Palatine. pm. Pre-maxilla. ps. Pre-sphenoid. pt. Pterygoid. and posteriorly. Its floor is formed by the palatal plates of the maxillae and palatines, and is pierced, towards its anterior end, by the anterior palatine foramina. The spheno-palatine foramen opens into the nasal cavity on each side towards the hinder end very near its floor. The bones of the cranial vault are densest at the surface, beneath which is a coarser, spongy bone-tissue termed " ; Here and there are much larger cavities, which are filled with air, and are termed sinuses. Of such there are two sets. The first of these, the frontal sinuses, are in the substance of the frontals (fs), and they communicate with the nasal fossae. The other set, the sphenoidal sinuses, are situated in the pre-sphenoid, and are smaller than the frontal sinuses (Fig. 49, ps\. § 40. Besides the ligaments of the skull already noticed—those connecting it with the vertebral column—other ligaments connect the mandible with the cranium. These may be described as the " capsular " and " stylo-maxillary n ligaments.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectanatomy, bookyear1881
