The Evolution of Man (Complete) |
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afterwards alimentary canal allantois allthe Amniotes amoeba Amphibia Amphioxus ancestors andthe animals anthropoid apes apostrophe arterial Ascidia asthe atthe biogenetic law blastula bloodvessels body bodycavity brain branchial bythe Catarrhines cavity cells cenogenetic Chapter chorda cleavage coelom coelompouches comparative anatomy connected Craniotes Cyclostoma distinguished dorsal embryology embryonic development embryonic vesicle entoderm especially evolution external Figure fishes folds foodyelk formation fromthe gastraea gastraea theory gastrula germinal layers gillarches gillclefts glands groove higher vertebrates human embryo important inner inthe intothe invertebrate kidneys lancelet later longitudinal lower mammals Marsupials medullary tube membrane mesoderm metazoa middle Monotremes nucleus ofthe onthe ontogeny organs original outer ovum palingenetic phylogenetic phylogeny Placentals plates primitive gut primitive mouth primitive segments protoplasm reptiles rudimentary segmentation segmentationcells Selachii senseorgans sexual simple skull spermatozoon stage stem stemcell stemform structure thatthe theory thetwo tothe transverse umbilical unicellular vascular ventral Vermalia vertebral column wall withthe yelk yelksac