Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 14, 2025
The males have sexual instincts, themselves dependent on the testicular hormone, which develop sexual jealousy and rivalry, and the Ruminants fight by butting with their heads because they have no incisor teeth in the upper jaw, or tusks, which are used in fighting in other species.
That portion of the superior maxillary bone which lies between the sockets of the eye-teeth protruded, with the sockets, to a remarkable degree, and instead of being curved appeared to be quite straight. The incisor teeth were very large and white, but it was the development of the eye-teeth that was most startling.
The canine teeth, the incisor teeth are torn away; yet, unwearied and insensible to suffering, they continue their efforts to escape. A dog was chained near a kitchen fire. He was incessant in his endeavours to escape, and, when he found that he could not effect it, he seized, in his impotent rage, the burning coals as they fell, and crushed them with his teeth.
While the incisor teeth are young, they are flattened on their sides, and bent somewhat backwards, and there is a decided cavity, in which a pulpy substance is enclosed. This, however, is gradually contracted as the age of the dog increases. M. F. Cuvier speaks of certain supernumerary teeth occasionally developed in each of the jaws.
In the horse the permanent nippers are full grown and in wear at three years of age; the permanent dividers are full grown and in wear at four years of age; and the permanent corners are full grown and in wear at five years of age. The table surfaces of the incisor teeth of a five-year-old horse show different degrees of wear.
The three lower incisor teeth of the left side. can. i. The little canine teeth grouped with them. p. The toothless front part of the upper jaw. m. s. Upper molars or "grinders." m. i. Lower molars or grinders. Horizontal view of the teeth in the lower and upper jaw of the goat. Upper incisor. inc. i. Lower incisor. m. s., m. i. They are all alike.
*To demonstrate the Teeth.*—Procure from the dentist a collection of different kinds of teeth, both sound and decayed. Make a drawing of an incisor and also of a molar. Examine both kinds of sections, noting arrangement and extent of dentine, enamel, and pulp. Make drawings. Which substance of the tooth appears to decay most readily?
We all know that the arm and hand of a monkey, the foreleg and foot of a dog and of a horse, the wing of a bat, and the fin of a porpoise, are fundamentally identical; that the long neck of the giraffe has the same and no more bones than the short one of the elephant; that the eggs of Surinam frogs hatch into tadpoles with as good tails for swimming as any of their kindred, although as tadpoles they never enter the water; that the Guinea-pig is furnished with incisor teeth which it never uses, as it sheds them before birth; that embryos of mammals and birds have branchial slits and arteries running in loops, in imitation or reminiscence of the arrangement which is permanent in fishes; and that thousands of animals and plants have rudimentary organs which, at least in numerous cases, are wholly useless to their possessors, etc., etc.
The voles of the land and water Their remarkable teeth The rodents and their incisor teeth The tooth and the chisel The skate "iron" Chewing the cud Teeth of the elephant Feet of the water-vole A false accusation Water-voles in gardens Winter stores Cats and water-voles Subterranean pioneering Mental character of the water-vole Standing fire Its mode of eating. Plop!
The teeth of middle-aged horses may be long, and in aged animals, narrow and short. The incisors meet at a more acute angle in old than young horses. The free portion of the incisor tooth is flattened from before to behind. At the level of the gums its two diameters are about the same, but the portion of the tooth imbedded in the jaw bone is flattened from side to side.
Word Of The Day
Others Looking