A textbook of obstetrics . iM¥-* lor \h 1 mm m4 |iuv* , \ ^\ Fig. 88.—Section of placental villi of a normal placenta at term : M, Fetalmesoderm; S, syncytial masses; V, V, fetal vessels; L, maternal lacunie, con-taining maternal blood (Durante).. Fig. 89.—Surface of villus at three weeks, showing syncytial band, A, andLanghans cells, B (500 enlargement); C, stroma of villus. the surface of the placenta into which the cord enters is seena smooth, shining membrane, continuous with the sheath of thecord,—the amnion. The fetal side of the placenta contrastsstrongly with the maternal surface.
A textbook of obstetrics . iM¥-* lor \h 1 mm m4 |iuv* , \ ^\ Fig. 88.—Section of placental villi of a normal placenta at term : M, Fetalmesoderm; S, syncytial masses; V, V, fetal vessels; L, maternal lacunie, con-taining maternal blood (Durante).. Fig. 89.—Surface of villus at three weeks, showing syncytial band, A, andLanghans cells, B (500 enlargement); C, stroma of villus. the surface of the placenta into which the cord enters is seena smooth, shining membrane, continuous with the sheath of thecord,—the amnion. The fetal side of the placenta contrastsstrongly with the maternal surface. The latter is of a dark-redhue, divided by deep sulci into lobules of irregular outline and i [8 PREGNANCY extent,—the cotyledons. Over the maternal surface of the pla-centa is stretched a delicate, -ravish, transparent membrane,which is made up n( the cells that compose the upper layer of thedecidua serotina. This constitutes the maternal portion of theplacenta. In separating from the uterine wall, therefore, the lineof separation docs not divide the fetal from the maternal struc-tures, hut is Ununl in the mucous membrane of the uterus, in thelower <A the cellular layer of the decidua. Around theperiphery of die placenta may
Size: 2191px × 1140px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
