...Each one of the perforations is the entrance to an oblique tunnel, whichis bored in the medullary sheath of the twig...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...As the parallelborders of the concave medullary plate fold towards each other and growunderneath the horny-plate, a cylindrical tube is formed, the medullary tube(Fig...
Ernst Haeckel 「The Evolution of Man」
...This is even clearer a little later, when the medullary furrowis closed into the nerve-tube (Fig...
Ernst Haeckel 「The Evolution of Man」
...rf medullary groove...
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」
...The broad dorsal furrow (rf) formed bythe medullary plate (m) is still wide open, but is divided from thelateral horn-plate(h) by the parallel medullary swellings, which eventually close...
Ernst Haeckel 「The Evolution of Man」
...Theedges of the medullary plate (m), the medullary swellings (w),which separate the medullary from the horn-plate (h), are bendingtowards each other...
Ernst Haeckel 「The Evolution of Man」
...On its dorsal side we find in themiddle line the straight medullary furrow, bordered by the two parallel dorsalor medullary swellings...
Ernst Haeckel 「The Evolution of Man」
...) Med medullary tube,Ca...
Ernst Haeckel 「The Evolution of Man」
...Simultaneously with the construction of the medullary tube we have in theAmphioxus-embryo the formation of the chorda, the cœlom-pouches, and themesoderm proceeding from their wall...
Ernst Haeckel 「The Evolution of Man」
...At the same time, the neural ormedullary tube is formed above the chorda, on the dorsal surface, by theclosing of the parallel medullary swellings...
Ernst Haeckel 「The Evolution of Man」
...This insignificant relic of the medullary tubeseems to be quite beyond comparison with the nervous centre of the vertebrate,yet it started from the same structure as the spinal cord of the Amphioxus...
Ernst Haeckel 「The Evolution of Man」
...They do not begin to diverge until afterthe medullary tube and alimentary canal, and the axial rod with the musclesbetween the two, have been formed...
Ernst Haeckel 「The Evolution of Man」
...Underthis is a soft medullary substance, which consists of entodermic cells withvacuoles...
Ernst Haeckel 「The Evolution of Man」
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