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
Risultati 1-5 di 22
Pagina v
... reproductive organs , and of tissues . - Forms intermediate between amoeba and hydra : Magosphæra , volvox . - Embryonic development . - Turbellaria : Appearance of a body wall , of ganglion , and nerve - cords . CHAPTER III WORMS TO ...
... reproductive organs , and of tissues . - Forms intermediate between amoeba and hydra : Magosphæra , volvox . - Embryonic development . - Turbellaria : Appearance of a body wall , of ganglion , and nerve - cords . CHAPTER III WORMS TO ...
Pagina 38
... reproductive organs for the production of eggs and spermatozoa form little protuberances on the out- side of the body below the tentacles . But hydra re- produces mostly by budding ; new individuals grow- ing out of the side of the old ...
... reproductive organs for the production of eggs and spermatozoa form little protuberances on the out- side of the body below the tentacles . But hydra re- produces mostly by budding ; new individuals grow- ing out of the side of the old ...
Pagina 41
... reproductive elements , eggs and spermatozoa . Fertili- zation , that is , the union of egg and spermatozoon , or mainly of their nuclei , takes place ; and the fertilized egg develops into a new organism . But the other cells , which ...
... reproductive elements , eggs and spermatozoa . Fertili- zation , that is , the union of egg and spermatozoon , or mainly of their nuclei , takes place ; and the fertilized egg develops into a new organism . But the other cells , which ...
Pagina 42
... reproductive cells . The other cells nourish and transport them and carry on the work of excretion and respiration . These latter correspond practically to our whole body . We call them somatic cells . In volvox they are entirely ...
... reproductive cells . The other cells nourish and transport them and carry on the work of excretion and respiration . These latter correspond practically to our whole body . We call them somatic cells . In volvox they are entirely ...
Pagina 50
... reproductive . It is doubtful whether any animal , except , perhaps , the mollusk , has as compli- cated and highly developed reproductive organs . By markedly higher 50 THE WHENCE AND THE WHITHER OF MAN.
... reproductive . It is doubtful whether any animal , except , perhaps , the mollusk , has as compli- cated and highly developed reproductive organs . By markedly higher 50 THE WHENCE AND THE WHITHER OF MAN.
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