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 son, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 23
Pagina v
... Hydra : The development of digestive and reproductive organs , and of tissues . Forms intermediate between amoeba and hydra : Magosphæra , volvox . - Embryonic development . - Turbellaria : Appearance of a body wall , of ganglion , and ...
... Hydra : The development of digestive and reproductive organs , and of tissues . Forms intermediate between amoeba and hydra : Magosphæra , volvox . - Embryonic development . - Turbellaria : Appearance of a body wall , of ganglion , and ...
Pagina 37
... hydra . This is a little , vase - shaped animal , which usually lives attached to grass - stems or sticks , but has the power to free itself and hang on the surface of the water or to slowly creep on the bottom . The mouth is at the top ...
... hydra . This is a little , vase - shaped animal , which usually lives attached to grass - stems or sticks , but has the power to free itself and hang on the surface of the water or to slowly creep on the bottom . The mouth is at the top ...
Pagina 38
... hydra re- produces mostly by budding ; new individuals grow- ing out of the side of the old one , like branches from the trunk of a tree , but afterward breaking free and leading an independent life . There are special forms of 38 THE ...
... hydra re- produces mostly by budding ; new individuals grow- ing out of the side of the old one , like branches from the trunk of a tree , but afterward breaking free and leading an independent life . There are special forms of 38 THE ...
Pagina 39
... hydra is vast , probably really greater than that between any other successive terms of our series . It may therefore be useful to consider one or two intermediate forms and the parallel embryonic stages of higher animals , and to see ...
... hydra is vast , probably really greater than that between any other successive terms of our series . It may therefore be useful to consider one or two intermediate forms and the parallel embryonic stages of higher animals , and to see ...
Pagina 42
... hydra gives us but a poor idea of the cœlente- rata , to which kingdom it belongs . The higher cœ- lenterata have nearly or quite all the tissues of higher animals — muscular , connective , glandular , etc. And by tissues we mean groups ...
... hydra gives us but a poor idea of the cœlente- rata , to which kingdom it belongs . The higher cœ- lenterata have nearly or quite all the tissues of higher animals — muscular , connective , glandular , etc. And by tissues we mean groups ...
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 - 1897 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1899 |
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 dominant ectoderm embryo embryology entoderm experience eyes fish functions future ganglion gastrula germ-plasm give groups heredity higher animals 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 reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming theory of evolution tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young