. Quain's elements of anatomy . A, upper half of the body ofa human embryo of three weeks,viewed from the abdominal side(from Coste); a, frontal jiUite ;h, protovertebrffi, on whichthe i^rimitive aortte are lying ;3, the middle of the tube of theheart, below it the place of en-trance of the great veins, aboveit the aortic bulb. B, lateral view of a humanembryo more advanced than that last refen-ed to (from A. Thomson); a, the frontal part of the head ; h, the vertebralcolumn ; v, the v/ide communication of the umbilical vesicle with the intestine ; u,allantoic pedicle; 2, auricular part of the
. Quain's elements of anatomy . A, upper half of the body ofa human embryo of three weeks,viewed from the abdominal side(from Coste); a, frontal jiUite ;h, protovertebrffi, on whichthe i^rimitive aortte are lying ;3, the middle of the tube of theheart, below it the place of en-trance of the great veins, aboveit the aortic bulb. B, lateral view of a humanembryo more advanced than that last refen-ed to (from A. Thomson); a, the frontal part of the head ; h, the vertebralcolumn ; v, the v/ide communication of the umbilical vesicle with the intestine ; u,allantoic pedicle; 2, auricular part of the heart connected with the veins posteriorly;3, ventricular part of the bent tube ; 4, the aortic bulb; near the extremities of thetube the divided pericardium is seen. • its fuller state of development, one of the earliest may be attributed tothe mere elongation of the tube, for the anterior and posterior extremitiesbeing fixed by the vascular connection to the body of the embryo, theelongating intervening part, which is not
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
