. The anatomy of the domestic animals. Veterinary anatomy. 670 BLOOD-VASCULAR SYSTEM OF THE HORSE (1) The umbilical artery is given off from the internal pudic about an inch (ca. 2-3 cm.) from the origin of that vessel. It is a very large artery in the foetus, in which it cm-ves downward and forward at the side of the bladtler in the edge of the lateral umbilical fokl of peritoneum, passes through the umbilical open- ing, becomes a component of the umbilical cord, and ramifies in the foetal placenta. After birth it extends only to the vertex oi the bladder and is much reduced. Its lumen is alm
. The anatomy of the domestic animals. Veterinary anatomy. 670 BLOOD-VASCULAR SYSTEM OF THE HORSE (1) The umbilical artery is given off from the internal pudic about an inch (ca. 2-3 cm.) from the origin of that vessel. It is a very large artery in the foetus, in which it cm-ves downward and forward at the side of the bladtler in the edge of the lateral umbilical fokl of peritoneum, passes through the umbilical open- ing, becomes a component of the umbilical cord, and ramifies in the foetal placenta. After birth it extends only to the vertex oi the bladder and is much reduced. Its lumen is almost obliterated and its wall is very thick, giving the vessel a cord-like character, hence it is connnonh- termed the round ligament of the bladder.^ It gives off small vesical branches (Aa. vesicales craniales) to the bladder, and twigs to the prostate and thictus deferens in the male. In the mare a small branch runs forward along tlie ureter into the broad ligament of the uterus. (2) Th(? middle haemorrhoidal or vesico-prostatic artery (A. hannorrhoitlalis media) in the male arises usually near the prostate and runs backward lateral to the rectum. It supijHes branches to the rectum, l)ladder, urethra, and accessory genital glands. In the female the homologous vessel is nuich larger and gives off the posterior uterine artery (A. Jig(fS^llrtlS?i>jiBfat<i|4tftti'f|ll!WiftM^ uterina eaudalis). This runs for- ward on tlie side of tiie vagina, to which it gives branches, and rami- fies on the body of the uterus, anas- tomosing with the anterior and middle uterine arteries. (In some cases this artery arises from the internal iliac or tlie umbihcal.) (3) The perineal artery (A. perinei) is relatively small in the male. It ascends at the side of the anus, which it supplies, and gives twigs to the bulbocavernosus nms- cle and the skin of the perineum. In the female it is large and is dis- tril )utetl to t he anus and vulva, and I gives a large branch to the vestibu- lar bulb. (4)
Size: 1819px × 1373px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
