. Kirkes' handbook of physiology . body, but chiefly to the head and blood of the right ventricle is sent out in small amount through the pul-monary artery to the lungs, and thence to the left auricle, as in the adult,but the greater part by far passes through a canal, the ductus arteriosus, lead-ing from the pulmonary artery into the aorta just below the origin of the three PARTURITION 697 great vessels which supply the upper parts of the body, and is distributed tothe trunk and lower parts of the body. A large portion passes out by wayof the two umbilical arteries to the placenta. F
. Kirkes' handbook of physiology . body, but chiefly to the head and blood of the right ventricle is sent out in small amount through the pul-monary artery to the lungs, and thence to the left auricle, as in the adult,but the greater part by far passes through a canal, the ductus arteriosus, lead-ing from the pulmonary artery into the aorta just below the origin of the three PARTURITION 697 great vessels which supply the upper parts of the body, and is distributed tothe trunk and lower parts of the body. A large portion passes out by wayof the two umbilical arteries to the placenta. From the placenta it is returnedby the umbilical vein to the under surface of the liver, from which the de-scription started. After birth the foramen ovale, the ductus arteriosus, and ductus venosusall close, and the umbilical vessels are tied off, so that the two streams of bloodwhich arrive at the right auricle by the superior and inferior vena cava, re-spectively, thenceforth mingle in this cavity of the heart, and pass into the. Fig. 505.—Dissection of the Lower Half of the Female Mamma During the Period of —In the left-hand side of the dissected part the glandular lobes are exposed and partially un-ravelled, and on the right-hand side the glandular substance has been removed to show thereticular loculi of the connective tissue in which the glandular lobules are placed, i, Upper partof the mammilla or nipple; 2, areola; 3, subcutaneous masses of fat; 4, reticular loculi of the con-nective tissue which support the glandular substance and contain the fatty masses; 5, one ofthree lactiferous ducts shown passing toward the mammilla, where they open; 6, one of the sinuslactei or reservoirs; 7, some of the glandular lobules which have been unravelled; 7, others massedtogether. (Luschka.) right ventricle, by way of the pulmonary artery to the lungs, and throughthese, after aeration, to the left auricle and ventricle, to be distributed overthe body. Parturition. With
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiology, bookyear1
