. Human physiology. est; but its centre rises intothe thorax; and, during its state of relaxation, forms an arch, themiddle of which is opposite the inferior extremity of the sternum. Itis tendinous in its centre, and is attached by two fasciculi, called jyillars, to the spine,—to theFig. T7. bodies of the first two lumbar vertebrae. Ithas three apertures;one before for the pas-sage of the vena cavainferior; and two be-hind, between the pil-lars, for the passage ofthe oesophagus andaorta. The other greatmuscles of respirationare the serratnsposticusinferior^ serratus posti-cus superior^ levato
. Human physiology. est; but its centre rises intothe thorax; and, during its state of relaxation, forms an arch, themiddle of which is opposite the inferior extremity of the sternum. Itis tendinous in its centre, and is attached by two fasciculi, called jyillars, to the spine,—to theFig. T7. bodies of the first two lumbar vertebrae. Ithas three apertures;one before for the pas-sage of the vena cavainferior; and two be-hind, between the pil-lars, for the passage ofthe oesophagus andaorta. The other greatmuscles of respirationare the serratnsposticusinferior^ serratus posti-cus superior^ levatorescostarum^ intercostalmuscles, infra-costales,and triangularis sternior sterno-costalis; but,in an excited conditionof respiration, all themuscles, that raise anddepress the ribs, di-rectly or indirectly,participate — as thescalejii, sterno-mastoidei,pectoralis, (major andminor,) serratus majoranticus, ahdominalmus-cles, &LQ,. In the structure ofthe lungs, as M. Ma-gendie has remarked,nature has resolved a. Anterior View of the Thoracic Viscera in situ, as shown by theremoval of the Anterior Parietes of the Thorax. 1. Superior lobe of right lung. 2. Its middle lobe. 3. Its inferiorlobe. 4, 4. Lobular fissures. 5, 5. luterual layer of costal pleuraforming the right side of the anterior mediastinum. 6, 6. Right dia-phragmatic portion of pleura costalis. 7, 7. Right pleura costalis onthe ribs. S. Superior lobe of left lung. 9. Its inferior lobe. 10, lissures. 11. Portion of pleura costalis which forms theleft side of the anterior mediastinum. 12. Left diaphragmatic portionof pleura costalis. 13. Left pleura costalis. 14, 14. The middle space niCchanical problem of between the pleurse, known as the anterior mediastinum. 15. Pen- . i . cardium. 16. Fibrous partition over which the plcur;c are Trachea. 18. Thyroid gland. 19. Anterior portion of thyroidcartilage. 20. Primitive carotid artery. 21. Subclavian vein. jugular vein. 23. Brachio
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Keywords: ., bookauthordungliso, bookcentury1800, bookdecade1850, bookyear1856
