. L'anatomie comparée des vertébrés. L'anatomie, les vertébrés ; comparatifs. Organe auditif 291 l'ensemble de ce dispositif complexe constitue l'oreille interne ou labyrinthe membraneux. Il est entouré de façon secondaire par mesodermic tissus, qui est d'abord et gélatineux en contact étroit avec elle. Un processus d'absorption puis prend place dans les couches supérieures du mésoderme, et donc un espace est mis au point en étroite collaboration qui reprend la forme de le labyrinthe membraneux, comme le fait aussi le mésoderme qui entoure cet espace et qui plus tard. Fio. 212.-éléments isolés du labyrinthe membraneux de

• Contributeur: The Book Worm / Alamy Banque D'Images
• ID de l’image: REFCGT
• Taille du fichier: 7,1 MB (255,1 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1781 x 1403 px | 30,2 x 23,8 cm | 11,9 x 9,4 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. AUDITORY ORGAN 291 The whole of this complicated apparatus constitutes the internal ear or membranous labyrinth. It becomes surrounded secondarily by mesodermic tissue, which is at first gelatinous and in close contact with it. A process of absorption then takes place in the innermost layers of the mesoderm, and thus a space is developed which closely repeats the form of the membranous labyrinth, as does also the mesoderm which encloses this space and which later. Fio. 212.—ISOLATED ELEMENTS OF THE MEMBRANOUS LABYRINTH OF VARIOUS VERTEBRATES. (After G. Retzius.) A, from the macula acustica communis of Myxine, ylntinoxa ; B, from the macula acustica neglecta of Raia clavata ; C, from the crista acustica of an ampulla of Amblyxtwna ; I), from the crista acustica of the anterior ampulla of liana esatlenta. t~, thread-like cells; hz, hair-cells with auditory hairs (h) ; n, nerve. On the left side of D the auditory hair has become broken up into its constituent fibres. becomes chondrified, and often also ossified. A membranous and a cartilaginous or bony labyrinth can thus be distinguished, and between them is a cavity (cavum perilymphaticum) filled with a lymph-like fluid (perilymph), and penetrated by connective tissue and blood-vessels extending from its walls to the membranous labyrinth. The cavity within the latter, which also contains a fluid (endolympli), is spoken of as the cavum endolymphaticum. In Amphioxus, an auditory organ is wanting. In all Craniates, except Cyclostomes (p. 295), three semicircular canals are present, U 2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923. London, Macmillan and co. , limited

Recherche dans la banque de photos par tags

• bookcentury1900
• bookdecade1900
• livresubjectanatomycomparative