Great Britain and Ireland Anato Society
Published: 2016-06-26
Total Pages: 558
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Excerpt from The Journal of Anatomy and Physiology, Vol. 20: Normal and Pathological The setting apart of one portion Of the single ventral vessel to form the heart differentiates the pre from the post-cardiac portions of the ventral vessel. The latter becomes venous, and we shall not at present trace its history farther. The former becomes the ventral aorta. The adult arterial system consists of the modified pre-cardiac ventral vessel, the dorsal trunk, the pre-cardiac lateral arcades, and the dorsal portions of the metameric vessels in the post cardiac segments, together with new branches arising from these. As a consequence Of the cardiac differentiation, the only places where complete metameric arcades remain are the pre-cardiac segments, where the ventral aorta is joined to the dorsal by vessels which become the lateral aortic or branchial arches. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.