The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895C. Scribner's Sons, 1899 - 312 pagine |
Dall'interno del libro
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Pagina vi
... reptiles to mammals . — The development of skeleton , appendages , circulatory and respiratory systems , and brain . -Mammals : The oviparous monotremata . -Marsupials . - Placental mammals . - Development of the placenta . - Prim- ates ...
... reptiles to mammals . — The development of skeleton , appendages , circulatory and respiratory systems , and brain . -Mammals : The oviparous monotremata . -Marsupials . - Placental mammals . - Development of the placenta . - Prim- ates ...
Pagina xi
... reptiles most closely resembles the old ancestor ? How did each of these ancestors look ? I do not know . It looks as if our ancestral tree were entirely uncertain and we were left without any founda- tion for history or argument . But ...
... reptiles most closely resembles the old ancestor ? How did each of these ancestors look ? I do not know . It looks as if our ancestral tree were entirely uncertain and we were left without any founda- tion for history or argument . But ...
Pagina 21
... Reptiles and amphibia were at first united in one class because of their resemblance in external form . Our common salamanders look so much like lizards that they generally pass by this name . But the young salamander , like all ...
... Reptiles and amphibia were at first united in one class because of their resemblance in external form . Our common salamanders look so much like lizards that they generally pass by this name . But the young salamander , like all ...
Pagina 22
... reptiles had been carefully studied it was evident that the amphibia stood far nearer the fish in general structure , while the higher reptiles closely approached birds . Then it was noticed that our common fish formed a fairly well ...
... reptiles had been carefully studied it was evident that the amphibia stood far nearer the fish in general structure , while the higher reptiles closely approached birds . Then it was noticed that our common fish formed a fairly well ...
Pagina 81
... reptile , and then take up the series of mammalian ancestors . But we have not sufficient time for so ex- tended a study , and a simpler method may answer our purpose fairly well . Let us fix our attention on the few organs which still ...
... reptile , and then take up the series of mammalian ancestors . But we have not sufficient time for so ex- tended a study , and a simpler method may answer our purpose fairly well . Let us fix our attention on the few organs which still ...
Altre edizioni - Visualizza tutto
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
Parole e frasi comuni
advance amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite archenteron attained become beginning better birds body brain cells cerebrum characteristics conformity to environment conscious degeneration digestion and reproduction dominant embryo embryology entoderm existence experience eyes fish functions future ganglion gastrula germ-plasm give groups higher forms highest human hydra important increase individual insect instinct intelligence jaws knowledge laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral motives muscles muscular muscular system natural selection nephridia nerve nervous system never notochord nutriment organs oxygen parapodia perception possible primitive probably progress protoplasm protozoa purely race reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young