Immagine di archivio da pagina 243 della encyclopaedia - Wikizionario di anatomia e. Il encyclopaedia - Wikizionario di anatomia e fisiologia cyclopdiaofana0402todd Anno: 1849 1028 TORACE. Tabella A.-relative lunghezze e peso di, e l'area della cassa toracica spazio circondato da rispettive nervature, compreso lo spazio costituito da lo sterno e cartilagini costiera. La nervatura. Lunghezza assoluta. Lunghezza di corda. Versed Area sinusoidale Sq. A. Peso, grani. 1 5-25 2-00 1-75 10- 98 2 9-00 3-75 3-00 27- 134 3 11-00 5-10 3-40 40- 181 4 12-25 6-00 3-50 51- 255 5 12-50 6-90 3-50 57- 308 6 12-60 7-10 3-50 63- 317 7 12-25 7-50 3-30 58-5 391 8 12-10 7-90 3-25 43

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Archive image from page 243 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 1028 THORAX. TABLE A.—Relative Lengths and Weight of, and Area of Thoracic Space encompassed by, the respective Ribs, including the Space made up by the Sternum and Costal Cartilages. Rib. Absolute Length. Chord Length. Versed Sine Area Sq. In. Weight, Grains. 1 5-25 2-00 1-75 10- 98 2 9-00 3-75 3-00 27- 134 3 11-00 5-10 3-40 40- 181 4 12-25 6-00 3-50 51- 255 5 12-50 6-90 3-50 57- 308 6 12-60 7-10 3-50 63- 317 7 12-25 7-50 3-30 58-5 391 8 12-10 7-90 3-25 43- 363 9 11-50 7-75 3'10 27- 280 10 10-50 7-00 2-90 20- 216 11 8-25 5-90 2-25 10- 145 12 4-50 3-75 1-00 7-5 60 Fig. 665. represents the above table by curves. The perpendicular lines represent the ribs; and the curves the characters re- ferred to. By a general view it will be seen that all the lines curve upwards, and are at their highest at about from the 5th to the 9th rib. We shall not treat of particular ribs, but of certain characteristics as they run through the ribs. A knowledge of their shape is ne- cessary to comprehending the respiratory movements in diagnosing thoracic disease. 1. Length. — The length of a rib may be taken in three ways, — its absolute length, chord length, and versed-sine length. (a) Absolute length.—In the length from the anterior to the posterior extremity, (A c B, fig. 664.) the 12th rib is the shortest. The 11th rib is nearly double the length of the 12th rib ; likewise the 2nd rib is nearly double the length of the 1st rib ; therefore the 1st and 2nd, and the llth and 12th differ more re- markably in their length than do any of the other ribs. The length (curve a, fig. 665.) suddenly increases up to the 4th rib ; and then the difference is trifling to the 8th rib; after this the shortening is as rapid as in the four superior ribs. (b) Chord length. — The dotted line b, fig. 665, represents this measurement. This length from tip to tip

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