extra-embryonic

• “A trophectoderm is: The extra-embryonic part of the ectoderm of mammalian embryos at the blastocyst stage before the mesoderm becomes associated with the ectoderm.”

  Stanford Scientist finds a "A solution to the stem cell dilemma that even the Vatican can love"

• “The finding that these extra-embryonic transplants elicited the same effects as the intraembryonic grafts gave definite evidence for the diffusible nature of tumoral nerve growth promoting factor.”

  Nobel Lecture The Nerve Growth Factor: Thirty-Five Years Later

• “The space between the amnion and the serosa constitutes the extra-embryonic celom, and for a time communicates with the embryonic celom.”

  I. Embryology. 11. Development of the Fetal Membranes and Placenta

• “Its dorsal surface is covered by the amnion, while its ventral surface is bounded by the extra-embryonic celom, and is in contact with the vitelline duct and yolk-sac.”

  I. Embryology. 11. Development of the Fetal Membranes and Placenta

• “The lateral leaves of somatopleure then grow round on each side, and, meeting on the ventral aspect of the allantois, enclose the vitelline duct and vessels, together with a part of the extra-embryonic celom; the latter is ultimately obliterated.”

  I. Embryology. 11. Development of the Fetal Membranes and Placenta

• “This fluid increases in quantity and causes the amnion to expand and ultimately to adhere to the inner surface of the chorion, so that the extra-embryonic part of the celom is obliterated.”

  I. Embryology. 11. Development of the Fetal Membranes and Placenta

• “In reptiles, birds, and many mammals the allantois becomes expanded into a vesicle which projects into the extra-embryonic celom.”

  I. Embryology. 11. Development of the Fetal Membranes and Placenta

• “The rudiment of the umbilical cord is represented by the tissue which connects the rapidly growing embryo with the extra-embryonic area of the ovum.”

  I. Embryology. 11. Development of the Fetal Membranes and Placenta

• “In the human embryo described by Peters the mesoderm outside the embryonic disk is split into two layers enclosing an extra-embryonic cœlom; there is no trace of an intra-embryonic cœlom.”

  I. Embryology. 13. Development of the Body Cavities

• “The two cavities in the general mesoderm unite on the ventral aspect of the gut and form the pleuro-peritoneal cavity, which becomes continuous with the remains of the extra-embryonic celom around the umbilicus; the two cavities in the pericardial area rapidly join to form a single pericardial cavity, and this from two lateral diverticula extend caudalward to open into the pleuro-peritoneal cavity (Fig. 54).”

  I. Embryology. 13. Development of the Body Cavities

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