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They bite edge to edge Post Date: Sun, 17 Aug 2008 21:56:08 +0000 Behind the canine teeth on each side above and below are two smaller teeth, which end in several sharp points. They are called premolars.They bite edge to edge in such a manner as to tear up and mangle the prey. Autor of the post: Undefined In closing the jaws Post Date: Sun, 17 Aug 2008 21:43:57 +0000 Behind these rises the strongest and most formidable of the set, the so-called carnassial tooth. It possesses a double-pointed cutting-edge. In closing the jaws the upper carnassials glide closely along the outer surface of the lower ones, and in this way form the saw-like blades of two pairs of shears, as cutting as instruments of steel. Autor of the post: Undefined (d) The position Post Date: Sun, 17 Aug 2008 21:32:57 +0000 (b) The dentated edges of these shear blades prevent the object to be cut up from slipping out. (c) As the premolars fit into each other and the carnassials glide past each other, the crowns of these teeth do not wear away (as in herbivorous animals), and the teeth, so far from becoming blunt, actually sharpen each other mutually. (d) The position of the carnassial teeth far lack in the short jaivs, ie, on the much shorter arm of a lever, still further intensifies their action. Autor of the post: Undefined The rounded, globose head Post Date: Sun, 17 Aug 2008 21:19:23 +0000 For, by the principle of levers, the shorter the arm on which the load acts, the greater is the effect of the power. Owing to the shortness of the jaws, the other teeth also rest on the short arms of levers, and can accordingly exert a powerful action. The rounded, globose head of the cat therefore stands in the closest relation to its mode of life. Autor of the post: Undefined Conse- quently the joints Post Date: Sun, 17 Aug 2008 21:08:04 +0000 (Compare the head of an ox.) (e) To keep the blades of the shears in a position most effectual for working, it is necessary that the shears be tight in their rivet. Conse- quently the joints of the lower jaw are very firm. Autor of the post: Undefined 3 Behind the upper carnassial Post Date: Sun, 17 Aug 2008 20:48:50 +0000 Their sockets are deep transverse grooves, in which the roller-shaped heads of the mandible can only turn about their axes. The mandible is thus only capable of an up-and-down motion, not of a lateral or forward movement, as is the case in ruminants and rodents (which see). 3 Behind the upper carnassial teeth we find on each side a small tooth with blunt prominences (molar tooth), which, as its grinding surface shows, serves to crush the food. Autor of the post: Undefined In its tongue Post Date: Sun, 17 Aug 2008 20:38:18 +0000 An inwardly directed projection of the upper carnassial has a similar signification. 4 These arrangements, however, are not sufficient for the thorough rubbing or crushing up of the food (see Section 9). In its tongue, which is provided with many sharp, backwardly-pointed spines, the cat possesses an additional instrument of attrition. Autor of the post: Undefined ) 5 The incisors, as one Post Date: Sun, 17 Aug 2008 20:22:12 +0000 Indeed, it furnishes the mouth with, as it were, an additional weapon. (Thus, the largest of the cats, the lion, can by repeated licking cause the skin of a man to bleed.) 5 The incisors, as one might gather from their small size, are not used for biting off large pieces of flesh, but merely for gnawing the bones. Autor of the post: Undefined 7 The work Post Date: Sun, 17 Aug 2008 20:08:01 +0000 6 The mouth forms a wide cleft, as may be seen when the animal is yawning. This enables it to drive the canine teeth deep into the flesh of its victim, to carry it off (see Section 8), and to tear it in pieces. 7 The work of the canine teeth and molars is carried out by very powerful muscles. Autor of the post: Undefined Their surface of attachment Post Date: Sun, 17 Aug 2008 19:53:10 +0000 The mouth being very wide, the masticatory or jugal muscles, though powerful, are not nearly so large as in rodents (which see). On the other hand, the temporal muscles are strongly developed. Their surface of attachment is enlarged by the development from the middle of the parietal bone of a high bony ridge or crest, which is continued into two lateral ridges in the occipital region. 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