Die segmentalen Wellen der Chorda dorsalis

1971 ◽  
Vol 133 (2) ◽  
pp. 172-183 ◽  
Author(s):  
A. J. Verbout
Keyword(s):  
Chorda Dorsalis

scholarly journals XV. On the chorda dorsalis

1841 ◽  
Vol 131 ◽  
pp. 195-199
Keyword(s):  
Whole Body ◽  
Chorda Dorsalis ◽  
Embryonic Structure

For the discovery of the remarkable structure in the embryo of some of the Vertebrata denominated the chorda dorsalis, we are indebted to Professor Baer. This naturalist considered it “the axis around which the first parts of the fœtus form,” and “the true virga mensoria for the whole body and all the chief systems.” Reichert supposes it to be that embryonic structure which serves as a “support and stay” for parts developed in two halves. In the course of my researches on the mammiferous ovum, an object was noticed which seems to correspond in appearance to the incipient chorda now referred to. I am desirous of drawing attention to this similarity in appearance, but more particularly to point out some important differences between my own observations and those of others, as to the mode of origin of the objects in question, and their relation to surrounding parts. For, should it be found that these objects are the same, my belief is that even the most recent views on the incipient growth of the embryo must undergo a change.

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