. Histoire naturelle de Cassell . ia, tlo pas flotter librement dans la poitrine, boutextend clown la colonne vertébrale, à laquelle ils sont attachés, et jusqu'à ce que les creux entre les theribs à leur jonction avec la colonne vertébrale. Ils sont de texture ferme et se composent de cellules distinolisables, remplissant non seulement les os creux d'air, mais aussi les cavités et les sacs nieni-latanés, qui sont situés de manière variable, mais manifestement conçus nioie complètement aérer le sang, et pour augmenter la légèreté du corps dans la sphère atmos-environnante. Et ainsi— • l’ail vital de l’ail envahit les mers marécageuses et les terres de régimation, AV

• Contributeur: Reading Room 2020 / Alamy Banque D'Images
• ID de l’image: 2CPD724
• Taille du fichier: 7,1 MB (131,3 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1121 x 2228 px | 19 x 37,7 cm | 7,5 x 14,9 inches | 150dpi

Informations supplémentaires

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

. Cassell's natural history . ia, tlo not float freely in the chest, butextend clown the spine, to which they are attached, and till up the hollows between theribs at their junction with the spine. They are firm in texture, and consist of distin-<iuishable cells, filling- not only the hollow bones with air, but also cavities and nieni-liraneous sacks, which are variously situated, but manifestly designed nioie completely toaerate the blood, and to increase the lightness of the body in the surrounding atmos-phere. And thus— • Tlic vital ail Pervades the swavining seas and licaving earths, AVhere teeming Nature broods licr myriad births ; Fills the tine lungs of all that breathe or bud, AVarms the new heart, and dyes the gushing blood; With lifes first s^Kirk ins])ires th organic frame, And as it wastes, renews the subtle flame. In glancing at the organs of respiration and voice, it may be observed tliat, in birds, thelipper aperture is at a considerable distance fronr the articidating parts. It is called the. no. 1«.- oHoANs OK hesiIkation and voice. iipiicr hiriiux, has its lips innnovcabie, and is not coveivd with un rpiff/nffix. At the bottom of the Iriiclirii (r), 111! point at whiili it branclii s into two, to form tin- hroiir/iin/ inhva (nn), UESriKVTIOX OF niKDS. 23 wliieh are represented entering the lungs (ll), and there is a piece of bone Ijing across, surmounted tli a crescent-shaped membrane (m) . On each side and below this piece ofbone—at the origin of each bronchial tulio—is an opening, the two lips of which are real, vocal chords. The first arch of the bronchial tubes is sej)arated by a membrane from thelast little bone which terminates the trachea. It is in this double drimi, called the lowerlarynx, that the voice of biids is formed, by means of the complicated play of the numerousmuscles which stretch or relax the vocal chords and the membranes of this wonderfulapjiaratus. It may be easily imderstood that the enormous volume of air, contai

Recherche dans la banque de photos par tags

• bookcentury1800
• bookdecade1850
• booksubjectbirds
• bookyear1854