Image d'archive à partir de la page 414 de la cyclopaedia de l'anatomie et. La cyclopaedia de l'anatomie et physiologie0402cyclopdiaofana todd Année : 1849 TUNICATA. 1199 et le pigment marron-granules, sont ronds, d'un diamètre de O'PLATE-FORME'' de O'OL'', ou d'Élon- gated, avec un diamètre de O'OOG'' à 0-008'' ; d'autres sont d'un pule la couleur et, à partir de la double et le noyau des cellules incluses (2 à 7) l'a vu dans certains d'entre eux, ressemblent fortement à l'articulation, les cellules de la animaux supérieurs. Cette ressemblance est rendue plus strik- ing par la ronde ou allongée de la forme de ces cellules, par l'arrangement particulier de l'en- clos

• Contributeur: Bookive / Alamy Banque D'Images
• ID de l’image: W28C87
• Taille du fichier: 5,7 MB (304,7 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 992 x 2015 px | 16,8 x 34,1 cm | 6,6 x 13,4 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.

Archive image from page 414 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 TUNICATA. 1199 and brown pigment-granules, are round, having a diameter of O'OOS'' to O'Ol'', or elon- gated, with a diameter of O'OOG'' to 0-008''; others are of a pule colour, and, from the double nuclei and the included cells (2 to 7) seen in some of them, strongly resemble the cartilage-cells of the superior animals. This resemblance is rendered the more strik- ing by the round or elongate form of these cells, by the peculiar arrangement of the en- closed cells, and by the union of some of the mother-cells, in this case generally round and smaller, into groups of two or four. This resemblance, however, is only external, and due only to the fact that the cells increase by formation in the interior, as in cartilage; because more exact observations show that these cells, by further transitions, become identical with the simpler pigment- cells described above, and are only the more developed forms of the latter, the pigment having disappeared by degrees on account of the condition of their growth. The third layer is formed of a yellowish, horny epidermis. The thin hairs which cover the surface of the Cynthia papillata are formed by this and the exterior fibrous layer. At certain spots a bundle of fibres springs up from the plane surface of the latter, which, being coated with the horny epidermis, rises on the surface as small needle-shaped bodies. Where the test of the Cynthia attains a thick- ness of i to '' and more, its composition often changes in a remarkable manner {fig. 776.). In this case the epithelium is succeeded Fig. 776. Transverse section of Cynthia paplllses externally into an irregular fibrous tissue, covered with a horny epidermis. Where this peculiar stratification of fibres exists, the test is not separable into lamina;, because the radiating fibres firmly connect the thin layers of circular fibres. Trea

Recherche dans la banque de photos par tags

• 1840
• anatomy
• archive
• bookauthor
• bookdecade
• bookpublisher
• booksubject
• bouquin
• physiologic
• todd_robert_bentley_1809_1860