. A text-book of agricultural zoology. Zoology, Economic. PLACENTA. 433 part only forming a discoidal patch; but this grows out all round, and invades the whole of the sub-zonal membrane except at the poles. There is thus formed a broad placental band, where the villi closely unite with the uterine pits specially formed. 4. Cotyledonary placenta (fig. 206).—This is characterised by. PlO. 206.—FCETUS OF Shebp. AL, AUantois, seen beneath chorion; Am, amnion ; P, P, placentae on chorion; C, umbilical cord ; al, al, extremities of allantoidean comua. (Cbauveau.) the villi of the placenta being fou
. A text-book of agricultural zoology. Zoology, Economic. PLACENTA. 433 part only forming a discoidal patch; but this grows out all round, and invades the whole of the sub-zonal membrane except at the poles. There is thus formed a broad placental band, where the villi closely unite with the uterine pits specially formed. 4. Cotyledonary placenta (fig. 206).—This is characterised by. PlO. 206.—FCETUS OF Shebp. AL, AUantois, seen beneath chorion; Am, amnion ; P, P, placentae on chorion; C, umbilical cord ; al, al, extremities of allantoidean comua. (Cbauveau.) the villi of the placenta being found in round scattered areas, the cotyledons, which fit into correspondiag thick areas studded with pits in the uterus. 5. In the diffuse placenta (fig. 207) the allantois (al) com- pletely surrounds the embryo (F), and the whole chorion (Ch) 2 E. 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 Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
