The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895W. Blackwood and Sons, 1896 - 312 pagine |
Dall'interno del libro
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Pagina 61
... segments move easily upon each other , and thus the animal can creep or writhe . two and the last . These segments are very much alike except the first If we examine one from the middle of the body we shall find its structure very much ...
... segments move easily upon each other , and thus the animal can creep or writhe . two and the last . These segments are very much alike except the first If we examine one from the middle of the body we shall find its structure very much ...
Pagina 62
... segment a pair of fin - like projections , stiffened with bristles , the parapodia . These are moved by special muscles and form effective organs of creeping . Within the muscles is the perivisceral cavity , and in its central axis the ...
... segment a pair of fin - like projections , stiffened with bristles , the parapodia . These are moved by special muscles and form effective organs of creeping . Within the muscles is the perivisceral cavity , and in its central axis the ...
Pagina 63
... SEGMENT OF ANNELID . LANG . dp and up , dorsal and ventral halves of parapodia ; b and ac , bristles ; k , gill ; de ... segment ; then of a chain of ganglia , one to each segment , on the ventral side of the body . With one ganglion in ...
... SEGMENT OF ANNELID . LANG . dp and up , dorsal and ventral halves of parapodia ; b and ac , bristles ; k , gill ; de ... segment ; then of a chain of ganglia , one to each segment , on the ventral side of the body . With one ganglion in ...
Pagina 64
... segment , and is becoming more a centre of control and perception for the body as a whole . It is more like our brain , com- mander - in - chief , the other ganglia constituting its staff . The sense - organs have improved greatly ...
... segment , and is becoming more a centre of control and perception for the body as a whole . It is more like our brain , com- mander - in - chief , the other ganglia constituting its staff . The sense - organs have improved greatly ...
Pagina 65
... segments differ- ing from those of the rest of the body ; these may , 5 REA UN ! ( 1- perhaps , be considered as the foreshadowings of a structure. 9. MYRMELEO FORMICARIUS . ANT - LION . HERTWIG ,. WORMS TO VERTEBRATES 65.
... segments differ- ing from those of the rest of the body ; these may , 5 REA UN ! ( 1- perhaps , be considered as the foreshadowings of a structure. 9. MYRMELEO FORMICARIUS . ANT - LION . HERTWIG ,. WORMS TO VERTEBRATES 65.
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
amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite attained become birds body brain cavity cells cerebrum Cheaper Edition church conformity to environment conscious Crown 8vo degeneration Demy 8vo digestive dominant ectoderm embryo evolution experience eyes Fcap fish functions ganglion gastrula germ-plasm give groups higher forms highest human hydra Illustrations increase individual insect instinct intelligence laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral muscles muscular natural selection nerve nervous system never notochord nutriment organs oxygen parapodia perception perivisceral Portrait Post 8vo primitive probably Professor progress protoplasm protozoa purely reflex action reproductive reptiles result schematic worm Scotland segments selfish sense-organs sequence skeleton species stage structure struggle surface survive swimming theory tion true truth turbellaria University of Edinburgh variation velopment vertebral column vertebrates vols volvox WHITHER young