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 22
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
... systems - 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 ...
... systems - 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 ...
Pagina 42
... muscular , connective , glandular , etc. And by tissues we mean groups of cells modified in form and structure for ... system they did possess . But the work of arranging these tissues and condensing them into com- pact organs was to be ...
... muscular , connective , glandular , etc. And by tissues we mean groups of cells modified in form and structure for ... system they did possess . But the work of arranging these tissues and condensing them into com- pact organs was to be ...
Pagina 53
... system consists of a supra - oesophageal ganglion with four posterior nerve - cords - one dorsal , two lateral , and ... muscles or muscular layers has been reduced in this animal . But such a reduction in the number of like parts in any ...
... system consists of a supra - oesophageal ganglion with four posterior nerve - cords - one dorsal , two lateral , and ... muscles or muscular layers has been reduced in this animal . But such a reduction in the number of like parts in any ...
Pagina 55
... muscular system . It seems to me altogether probable that all , except possibly Mollusca , are descended from a ... systems . The higher groups of this kingdom had CHAPTER III WORMS TO VERTEBRATES: SKELETON AND HEAD Worms and the ...
... muscular system . It seems to me altogether probable that all , except possibly Mollusca , are descended from a ... systems . The higher groups of this kingdom had CHAPTER III WORMS TO VERTEBRATES: SKELETON AND HEAD Worms and the ...
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