. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE CHORION 123 be termed the embryotroph and the type of placentation which obtains up to this stage and for some time longer may be termed the embryo- trophic type. But even in the Peters ovum the preparation for another type has begun. In earlier stages the cell cords were entirely trophoblastic, but in this ovum (Fig. 70) processes from the chorionic mesoderm may be seen projecting into the bases of the cell cords, and in later stages these processes extend farther and farther into the ax
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE CHORION 123 be termed the embryotroph and the type of placentation which obtains up to this stage and for some time longer may be termed the embryo- trophic type. But even in the Peters ovum the preparation for another type has begun. In earlier stages the cell cords were entirely trophoblastic, but in this ovum (Fig. 70) processes from the chorionic mesoderm may be seen projecting into the bases of the cell cords, and in later stages these processes extend farther and farther into the axis of each cord, the anastomoses of the cords disappear and the cords themselves become converted into branching processes, the. Fig. 71.—Entire Ovum Aborted at about the Beginning of the Second Month. Xi 1/2.—(Grosser.) chorionic villi, which project from the entire surface of the ovum (Fig. 71) into the surrounding space, which may now be termed the intervillous space, and are bathed by the maternal blood which it contains. Toward the maternal surface of the space some masses of the trophoblast still persist, uniting the extremities of certain of the villi to the enclosing uterine wall, such villi being termed fixation villi to distinguish them from the majority, which project freely into the intervillous space. Later, when the embryonic blood-vessels. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
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Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectembryology
