...ak, ik, mk outer, inner, and middle germinal layer,hp horn plate, mp medullary plate, ch chorda, * and *disposition of the cœlom-pouches, lh body-cavity... 
Ernst Haeckel 「The Evolution of Man」
...At each side of the medullary tube, between it and the alimentarytube (Figs...
Ernst Haeckel 「The Evolution of Man」
...The dorsal half contains the narrowspinal-column cavity or vertebral canal above the chorda, in which liesthe tube-shaped central nervous system, the medullary tube...
Ernst Haeckel 「The Evolution of Man」
...F Theprovertebræ (w) begin to grow round the medullary tube (mr) andthe chorda (ch): the gut (d) is cut off from the umbilicalvesicle (nb)...
Ernst Haeckel 「The Evolution of Man」
...i entoderm, d primitive gut,cn medullary duct, n nerve tube, m mesoderm, sfirst primitive segment, c cœlom-pouches...
Ernst Haeckel 「The Evolution of Man」
...128 pr),examined from above, appears to be the straightcontinuation of the fore-lying and younger medullary furrow (me)...
Ernst Haeckel 「The Evolution of Man」
...This tube is of the utmost importance; it is the beginning of the centralnervous system, the brain and spinal marrow, the medullary tube...
Ernst Haeckel 「The Evolution of Man」
...The medullary tube afterwards separates completely from the outergerminal layer, and is surrounded by the middle parts of the provertebræ andforced inwards (Fig...
Ernst Haeckel 「The Evolution of Man」
...The formation of the alimentary canal resembles that of the medullary tube tothis extent—in both cases a straight groove or furrow arises first of allin the middle line of a flat layer...
Ernst Haeckel 「The Evolution of Man」
...C both the medullary tube and the dorsal wall above and the alimentarycanal and ventral wall below are closed...
Ernst Haeckel 「The Evolution of Man」
...) From a dorsal lateral joint ofthe medullary tube (spc) the spinal ganglia (spg) grow outbetween it and the horn-plate...
Ernst Haeckel 「The Evolution of Man」
...) d primitive gut,u primitive mouth, p polar cells of the mesoderm, ccœlom-pouches, m their first segment, n medullary tube, ientoderm, e ectoderm, s first segment-fold...
Ernst Haeckel 「The Evolution of Man」
...The upperplate presses between the chorda and the medullary tube, the lower between thechorda and the alimentary canal (Fig...
Ernst Haeckel 「The Evolution of Man」
...) Med medullary tube,Ca...
Ernst Haeckel 「The Evolution of Man」
...This groove is, of course, the dorsal furrow,and the swellings are the dorsal or medullary swellings; they form the firststructure of the central nervous system, the medullary tube...
Ernst Haeckel 「The Evolution of Man」
...These gonads are not yet independent sexualglands, but sexually differentiated cell-groups in the medullary substance, or,in other words, parts of the gut-wall...
Ernst Haeckel 「The Evolution of Man」
...Thus, for instance, the chief part of the central nervoussystem is a long dorsal neural string that runs above the gut and correspondsto the medullary tube of the Chordonia...
Ernst Haeckel 「The Evolution of Man」
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