Publisher's Synopsis
Excerpt from Contributions to Embryology, Vol. 14: Nos. 65-71
Concerning the origin of the pulmonary vessels, not only is our present know ledge meager, but the views are con?icting and based on observations of embryos of different forms, made with varying technique. Wax reconstruction of small blood-vessels, while a valuable asset to the embryologist, is open to manifold errors, and where possible should be checked up by injections. Confusion has arisen from the efforts to prove or disprove the probable course of events in one embryonic form from observations on another embryonic form. In recent studies of the pulmonary vessels, guinea-pig, rabbit, cat, and chick embryos have been represented. The finer details in the development of separate structures might follow quite different courses in these several forms. Although it is to be remembered that any attempt to draw conclusions for one on the basis of another is open to error, this study is presented in the hope that demonstrating the developmental steps of the vessels of the lung in the chick may by comparison prove of value in working out the embryology of similar structures in other forms.
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