Carpenter's principles of human physiology . riod of preg-nancy it contains in addition, glycogen, traces of the bile salts, and urea. Likethe Allantois it possesses a contractile power, owing to the unstriated musclewhich it obtains from the somatopleure. During the first two months ofgestation, the amnion and the inner lining of the chorion (which is really thereflected layer of the amnion, Fig. 347, h, just as the lining of the abdominalcavity is formed by the peritoneum) are separated by a gelatinous-lookingsubstance ; which probably aids in the nutrition of the embryo, previously tothe fo
Carpenter's principles of human physiology . riod of preg-nancy it contains in addition, glycogen, traces of the bile salts, and urea. Likethe Allantois it possesses a contractile power, owing to the unstriated musclewhich it obtains from the somatopleure. During the first two months ofgestation, the amnion and the inner lining of the chorion (which is really thereflected layer of the amnion, Fig. 347, h, just as the lining of the abdominalcavity is formed by the peritoneum) are separated by a gelatinous-lookingsubstance ; which probably aids in the nutrition of the embryo, previously tothe formation of the placenta. This is absorbed during the second month;and the amnion is then found immediately beneath the chorion.—In theUmbilical Cord, when it is completely formed, the following parts may betraced. 1. The tubular sheath afforded by the Amnion. 2. The UmbilicalVesicle (Fig. 348, t), with its pedicle, or vitelline duct. 3. The VasaOmphalo-Mesaraica (g, r), or mesenteric vessels of the embryo, by which the Fig. 348. Fig.
Size: 1565px × 1596px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectphysiology, bookyear1
