. The American journal of anatomy . s of the postcardinal. The more deli-cate lining of the lymphatic space as compared with that of the veins and venulescan be clearly distinguished in the figure. (Reconstruction, fig. 30.) of its wall can be distinguished without the least 17, again, illustrates the occasional circumclusion of theprecardinal veno-lymphatics (6b) by this space and draws moreplainly, perhaps, the distinction between lymphatics and venouschannels, where the latter are replete with blood and possesssharply defined boundaries as compared with the often ill-defin
. The American journal of anatomy . s of the postcardinal. The more deli-cate lining of the lymphatic space as compared with that of the veins and venulescan be clearly distinguished in the figure. (Reconstruction, fig. 30.) of its wall can be distinguished without the least 17, again, illustrates the occasional circumclusion of theprecardinal veno-lymphatics (6b) by this space and draws moreplainly, perhaps, the distinction between lymphatics and venouschannels, where the latter are replete with blood and possesssharply defined boundaries as compared with the often ill-definedoutlines of the lymphatic space. Caudally this long space aftera course which can be easily pursued through thirty-seven sec-tions, as already stated, becomes more indistinct until it vanishesby the loss of its cavity in the confusion of the interstices of thetissue reticulum, but after a number of sections it is followed by asecond space, which, though shorter and simpler (figs. 13 and 31), 442 11d 4d OTTO F. KAMPMEIER 25 13 11s. 17 21 Fig. 16 Transverse section taken a few sections beyond the one represented bythe preceding figure from a 23 mm. pig embryo (series 23a, , slide 26,section 12), X 200. 4d, long fusiform space in the right thoracic duct line, andmesenchymal bridges traversing its lumen; 4s, lymphatic space at the level of theleft Cuvierian duct {21) and in the pathway of the left thoracic duct; lid, lis,right and left postcardinals; 13, aorta; 17, eosophagus; 25, branch of the post-cardinals. (Reconstruction, fig. 30.) exhibits the same peculiarities of character. This again is fol-lowed by tissue which is still undifferentiated but coarsely retic-ulate and persistently suggests the potentiality of further lympha-tic anlagen. Both of the spaces described and figured are situatedin the axis of the injected channel and consequently in the axisof the ultimately complete thoracic duct. On the left side in series 23a the principle of lymphatic develop-men
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
