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 54
Pagina v
... nerve - cords . CHAPTER III WORMS TO VERTEBRATES : SKELETON AND HEAD . 55 Worms and the development of organs . - Mollusks : The external protec- tive skeleton leads to degeneration or stagnation . - Annelids and arthro- pods : The ...
... nerve - cords . CHAPTER III WORMS TO VERTEBRATES : SKELETON AND HEAD . 55 Worms and the development of organs . - Mollusks : The external protec- tive skeleton leads to degeneration or stagnation . - Annelids and arthro- pods : The ...
Pagina vi
... nervous action . - Reflex action , unconscious and comparatively mechanical . -Instinctive action : The actor is conscious , but guided by heredity . - In- telligent action . — The actor is conscious , guided by intelligence resulting ...
... nervous action . - Reflex action , unconscious and comparatively mechanical . -Instinctive action : The actor is conscious , but guided by heredity . - In- telligent action . — The actor is conscious , guided by intelligence resulting ...
Pagina 19
... nervous , that my argument will in the main be based . But it is on But if the older ancestors have so generally dis- appeared , and their surviving relatives have been so greatly modified , how can we make even a shrewd guess at the ...
... nervous , that my argument will in the main be based . But it is on But if the older ancestors have so generally dis- appeared , and their surviving relatives have been so greatly modified , how can we make even a shrewd guess at the ...
Pagina 38
... nervous cells and fibrils . As in every nervous system , three elements are here to be found . 1. An afferent or sen- sory nerve - fibril , which under adequate stimulus is set in vibration by some cell of the epidermis or ectoderm ...
... nervous cells and fibrils . As in every nervous system , three elements are here to be found . 1. An afferent or sen- sory nerve - fibril , which under adequate stimulus is set in vibration by some cell of the epidermis or ectoderm ...
Pagina 45
... intestine and of its glands has arisen from the entoderm . And only the epidermis , or outer layer of our skin , and the nervous system and parts of our sense - organs have arisen from the ectoderm . But PROTOZOA TO WORMS 45.
... intestine and of its glands has arisen from the entoderm . And only the epidermis , or outer layer of our skin , and the nervous system and parts of our sense - organs have arisen from the ectoderm . But PROTOZOA TO WORMS 45.
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