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 63
Pagina xii
... muscular system cannot develop and do its work until some sort of a digestive system has arisen to furnish nutriment , any more than a steam- engine can run without fuel . And a brain is of no use until muscle and sense - organs have ...
... muscular system cannot develop and do its work until some sort of a digestive system has arisen to furnish nutriment , any more than a steam- engine can run without fuel . And a brain is of no use until muscle and sense - organs have ...
Pagina 19
... muscular , digestive , ner- vous , etc. - they give us a very fair idea of what our ancestor at each stage must have been . But it is on this balance and relative development of the different systems , that is , whether an animal is ...
... muscular , digestive , ner- vous , etc. - they give us a very fair idea of what our ancestor at each stage must have been . But it is on this balance and relative development of the different systems , that is , whether an animal is ...
Pagina 32
... muscular cells . Prick it with a needle and it con- tracts . It recognizes its food even at a microscopic CHAPTER II PROTOZOA TO WORMS: CELLS, TISSUES, AND ORGANS Amoeba: Its anatomy and physiology -Development of the cell.
... muscular cells . Prick it with a needle and it con- tracts . It recognizes its food even at a microscopic CHAPTER II PROTOZOA TO WORMS: CELLS, TISSUES, AND ORGANS Amoeba: Its anatomy and physiology -Development of the cell.
Pagina 38
... muscles are contracted , the pressure of the water length- ens the body and tends to extend the tentacles . On the outside of the elastic membrane , just be- neath the ectoderm , is a plexus or cobweb of nervous cells and fibrils . As ...
... muscles are contracted , the pressure of the water length- ens the body and tends to extend the tentacles . On the outside of the elastic membrane , just be- neath the ectoderm , is a plexus or cobweb of nervous cells and fibrils . As ...
Pagina 42
... muscular , connective , glandular , etc. And by tissues we mean groups of cells modified in form and structure for the performance of a special work or function . The protozoa developed the cell for all time to come , the cœlenterata ...
... muscular , connective , glandular , etc. And by tissues we mean groups of cells modified in form and structure for the performance of a special work or function . The protozoa developed the cell for all time to come , the cœlenterata ...
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