. Types and market classes of live stock. ppHed with blood. The blood leaves the heartthrough the posterior aorta, common iliacs, and external iliac,which carry backward to the region of the hips. The exter-nal iliac there divides into two arteries, one of which, theprepubic, divides into the two pudic arteries, the external oneof which passes down the thigh and gives off a branch, knownas the mammary artery, which enters the top of the udderfrom the rear. The mammary artery has four large branches, Types and Market Classes of Live Stock 135 one for each quarter of the udder, and there is also
. Types and market classes of live stock. ppHed with blood. The blood leaves the heartthrough the posterior aorta, common iliacs, and external iliac,which carry backward to the region of the hips. The exter-nal iliac there divides into two arteries, one of which, theprepubic, divides into the two pudic arteries, the external oneof which passes down the thigh and gives off a branch, knownas the mammary artery, which enters the top of the udderfrom the rear. The mammary artery has four large branches, Types and Market Classes of Live Stock 135 one for each quarter of the udder, and there is also a smallbranch for each rudimentary gland. The large branches sub-divide within the gland tissue. The venous circulation is more complex than the blood is collected from the capillaries by from 14 to 17large veins which empty into the mammary vein runningparallel with the mammary artery at the top of the mammary vein is divided into two parts which encirclethe top of the udder and connect in front and behind like a. Fig. 36. Circulation To and From the Udder. The broken lines represent the arteries which carry blood contain-ing the nutritive material to the udder where it is manufactured intomilk. The heavy black lines represent the veins which carry the bloodback to the heart. Note that there is but one route from the heart tothe udder, whereas there are two routes from the udder to the v., milk vein; M. W., milk well. (After Bitting of the IndianaExperiment Station.) rope tied around it. From this circuit of veins the bloodreturns to the heart by two routes. One route leads out toto the rear of the udder, then up to the region of the hips,and thence to the vena cava and the heart, the veins alongthe route being parallel to the arteries through which theblood came, and being similarly named. The other route isalready familiar, leading out in front of the udder through thelarge subcutaneous abdominal veins (milk-veins) which pass 136 Types and Ma
Size: 1956px × 1277px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1910, bookidtypesmarketclass01vaug
