Veterinary obstetrics, including the diseases of breeding animals and of the new-born . birth canal, or even slightly before. In carnivora andthe .sow the umbilic cord is frequently not ruptured in a spon-taneous way, but is torn in two by the teeth of the mother. The point at which the navel cord naturally ruptures or isdivided by the mother corresponds quite closely in all our do-mestic animals. In examining the navel cord of the foal, we Care of the Neiv-Born Animal i59 find that immediately against the umbilicus there is a dense areaextending for a distance of about i V2 inches, which ends
Veterinary obstetrics, including the diseases of breeding animals and of the new-born . birth canal, or even slightly before. In carnivora andthe .sow the umbilic cord is frequently not ruptured in a spon-taneous way, but is torn in two by the teeth of the mother. The point at which the navel cord naturally ruptures or isdivided by the mother corresponds quite closely in all our do-mestic animals. In examining the navel cord of the foal, we Care of the Neiv-Born Animal i59 find that immediately against the umbilicus there is a dense areaextending for a distance of about i V2 inches, which ends some-what abruptly by a marked ring in the soft umbilic cord. Thisprojection, A, Fig. 90 B, consists of a hairless skin, which, in thehealing of the navel, atrophies and disappears. In the calf, thecorresponding cutaneous navel is haired and persists for somemonths as a conical projection of skin, thickly covered with longhairs. Just beyond this point, one or two inches from it in thefoal, is the weakest point in the cord, and it is at this point thatit ruptures or is torn in Fig. 90 B. Umbilic Cord of Cutaneous portion of cord. B, Amniotic portion of cord. After it ruptures, the behavior of the parts when left undis-turbed is interesting and highly suggestive of the degree andcharacter of interference demanded upon the part of the attend-ant. One of the most prominent effects of the rupture of thecord by linear tension or by laceration by the teeth of the mother,is the promptness with which hemostasis is brought about, sothat as a rule there is but little hemorrhage, appearing usuallyto not exceed the amount of blood hing in the umbilic veinsoutside the umbilic ring. 560 Veterinary Obstetrics The two fetal ends of the umbilic arteries retract verypromptly toward and into the abdominal cavity, and in doing sotheir cavities become decreased by the shortening and consequentthickening of their walls, which tend to close them completelyand prevent hemorrhage. Additio
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