- EAN13
- 9782384690855
- Éditeur
- Human and Literature Publishing
- Date de publication
- 26/04/2022
- Langue
- anglais
- Fiches UNIMARC
- S'identifier
Livre numérique
-
Aide EAN13 : 9782384690855
- Fichier EPUB, libre d'utilisation
- Fichier Mobipocket, libre d'utilisation
- Lecture en ligne, lecture en ligne
Mise en Forme
- Aucune information
Fonctionnalités
- Balisage de la langue fourni
Normes et Réglementations
- Aucune information
3.49
Few natural groups present so many remarkable illustrations of several of the
most important general laws which appear to have determined the structure of
animal bodies as that of the whales.
The term "whale" is commonly but vaguely applied to all the larger and middle-
sized Cetacea, and, though such smaller species as the dolphins and porpoises
are not usually spoken of as whales, they may to all intents and purposes of
zoölogical science be included in the term. Taken all together the Cetacea
constitute a distinct and natural order of mammals, characterized by their
aquatic mode of life and external fish-like form. The body is fusiform,
passing anteriorly into the head without any distinct constriction or neck,
and posteriorly tapering off gradually toward the extremity of the tail, which
is provided with a pair of lateral pointed expansions of skin supported by
dense fibrous tissue, called "flukes," forming together a horizontally placed,
triangular propelling organ.
most important general laws which appear to have determined the structure of
animal bodies as that of the whales.
The term "whale" is commonly but vaguely applied to all the larger and middle-
sized Cetacea, and, though such smaller species as the dolphins and porpoises
are not usually spoken of as whales, they may to all intents and purposes of
zoölogical science be included in the term. Taken all together the Cetacea
constitute a distinct and natural order of mammals, characterized by their
aquatic mode of life and external fish-like form. The body is fusiform,
passing anteriorly into the head without any distinct constriction or neck,
and posteriorly tapering off gradually toward the extremity of the tail, which
is provided with a pair of lateral pointed expansions of skin supported by
dense fibrous tissue, called "flukes," forming together a horizontally placed,
triangular propelling organ.
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