Chemical News and Journal of Industrial Science, Tom 145,Wydanie 3776Chemical news office., 1932 |
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Strona 115
... possible , animals often of separate sexes , sex organs with ducts and copulatory apparatus of modified appendages , larval stages in free swimming forms of few segments , gradually increasing in complex- ity and number of segments ...
... possible , animals often of separate sexes , sex organs with ducts and copulatory apparatus of modified appendages , larval stages in free swimming forms of few segments , gradually increasing in complex- ity and number of segments ...
Strona 117
... possible , distinct ectoderm , endoderm and mesoderm , the latter separating to form a definite cœlom , blastopore posterior and dorsal in position , laval form ( tadpole ) , at first with the yolk sac as swelling of lower surface ...
... possible , distinct ectoderm , endoderm and mesoderm , the latter separating to form a definite cœlom , blastopore posterior and dorsal in position , laval form ( tadpole ) , at first with the yolk sac as swelling of lower surface ...
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added adult alimentary canal analogy analysis animals Applications arranged atom becoming bilateral Black blastopore body bone British Canada carbon cavities character Chemical chemistry circulatory system clearly cœlom compared conception consider constructed containing definite described developed discoveries distinct dominant dorsal Drebbel ducts element embryo exact excretory experiments external extract force fundamental gills give given groups gypsum head heart higher ideas important included industry interest internally known laboratory latter Lavoisier less light limbs London lungs malt material means ment mesoderm method molecule mouth muscle National Mark nature neck nervous system obtained opening organic molecule organs original pairs Paris passing Patent Phylum physical placenta plant position possible present Priestley primitive problem produce quantitative Ratio reproduction segments sense separate short skeleton sometimes stages structure substances tail tion trunk types urogenital usually various vegetative whole