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 26
Pagina v
... ganglion , and 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 ...
... ganglion , and 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 ...
Pagina 38
... ganglion cells , so that they may act in unison . In the higher animals we shall find these cen- tral or ganglion cells condensed in one or a few masses or ganglia . But here they are scattered over the whole surface of the elastic ...
... ganglion cells , so that they may act in unison . In the higher animals we shall find these cen- tral or ganglion cells condensed in one or a few masses or ganglia . But here they are scattered over the whole surface of the elastic ...
Pagina 49
... ganglion . And be- cause this ganglion through- out higher forms usually lies over the oesophagus , it is called the supra - oesophageal ganglion . This is the first faint and dim prophecy of a brain , and it sends its nerves to the ...
... ganglion . And be- cause this ganglion through- out higher forms usually lies over the oesophagus , it is called the supra - oesophageal ganglion . This is the first faint and dim prophecy of a brain , and it sends its nerves to the ...
Pagina 52
... hind- intestine , or rectum , with the anal opening . The front and hind - intestine are lined with infolded outer skin . The nervous system consists of a supra - oesophageal ganglion 52 THE WHENCE AND THE WHITHER OF MAN.
... hind- intestine , or rectum , with the anal opening . The front and hind - intestine are lined with infolded outer skin . The nervous system consists of a supra - oesophageal ganglion 52 THE WHENCE AND THE WHITHER OF MAN.
Pagina 53
... ganglion with four posterior nerve - cords - one dorsal , two lateral , and one ( or perhaps two ) ventral . There were probably also remains of the old plexus , but this is fast disappearing . The excretory system consists of a pair of ...
... ganglion with four posterior nerve - cords - one dorsal , two lateral , and one ( or perhaps two ) ventral . There were probably also remains of the old plexus , but this is fast disappearing . The excretory system consists of a pair of ...
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