The laws and mechanics of circulation, with the principle involved in animal movement . ig. 27) soas to bring the muscular fibres in correspondence with thelong axis in the ribs (A,f,f); hence, when contraction setsin during inspiration, the traction would necessarily be uponthe ends of the costal bows, tending to bend and flare themopen upon the sides like the ribs in an umbrella, while theirresiliency would impart elastic action to expiration with reliefin the traction force which this produces. The natural curva-ture of the ribs, being also slightly twisted upon the long axis, * In destroyi
The laws and mechanics of circulation, with the principle involved in animal movement . ig. 27) soas to bring the muscular fibres in correspondence with thelong axis in the ribs (A,f,f); hence, when contraction setsin during inspiration, the traction would necessarily be uponthe ends of the costal bows, tending to bend and flare themopen upon the sides like the ribs in an umbrella, while theirresiliency would impart elastic action to expiration with reliefin the traction force which this produces. The natural curva-ture of the ribs, being also slightly twisted upon the long axis, * In destroying the intercostal muscles, great care is necessary to preventpuncturing the pleurae, which is extremely difficult. •{•This circumstance I had seen strikingly illustrated after the removal of amalignant tumor of the chest, in which the intercostals were laid bare, andwhich flopped to and fro during respiration, being pushed in and out alter-nately by the changes in pressure within the chest, which continued to expandand contract in the usual way. DIAPHRAGM OPERATING THE RIBS. 89. Pig. 26.—Showing the manner in which the diaphragm is attached to the cartilages ofthe inferior ribs, viewed from below.—Cbauveau. 1,1, pillars of the diaphragm ;2, left pillar ; 3, common tendon ; 4, tendinous attachments to the cartilages ; 4,muscular attachments ; 5, attachments to control tendons ; 6, vena cava opening ;7, oesophagus ; 8, aorta ; 10, psoas magnus ; 11, psoas parvus ; 12, transverse pro-cess of lumbar vertebra ; 13, superior or external lumbar muscles. Diaphragm of the Horse ; Posterior Face.—1, 1, the two portions of the right pillar ; 2,left pillar; 3, tendons of the pillars ; 4, 4, peripheral muscular portion ; 5, leftleaflet of the aponeurotic portion ; 5, 5, right leaflet of the same ; 6, posterior venacava ; 7, oesophagus passing through the opening in the right pillar ; 8, posterioraorta between the two pillars ; 9, cartilaginous circle of the ribs ; 10, 11, section
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Keywords: ., bookcentury1800, bookde, booksubjectblood, booksubjectrespiration
