. Human physiology. answer the purpose. Lay the deadanimal on its back, stretch out its limbs, and pin them firmly to a flat take a sharp-pointed knife, and cut the skin from the throat in a straightline down to the tail, taking care that the knife does not eiter into the flesh atany point. Now loosen the skin from the flesh, and pin it also to the board,spreading it out, right and left, to the greatest possible extent. The arrange-ment of the ribs may now be seen, with the thin walls of muscle or flesh 6o ELEMENTARY PHYSIOLOGY (intercostal muscles) which unite them. These, together
. Human physiology. answer the purpose. Lay the deadanimal on its back, stretch out its limbs, and pin them firmly to a flat take a sharp-pointed knife, and cut the skin from the throat in a straightline down to the tail, taking care that the knife does not eiter into the flesh atany point. Now loosen the skin from the flesh, and pin it also to the board,spreading it out, right and left, to the greatest possible extent. The arrange-ment of the ribs may now be seen, with the thin walls of muscle or flesh 6o ELEMENTARY PHYSIOLOGY (intercostal muscles) which unite them. These, together with the back-bonebehind, and the breast-bone in front, form the walls of the upper portion ofthe great cavity. The lower portion has no such firm framework. It issupported by the vertebral column behind ; but, round the sides and front,the walls consist of flesh and fibrous connective tissue only. The flesh consti-tutes the muscles of the abdomen, abdomen being the name of the lowerportion of the great body Fig. 73.—The Cavities of theHuman Body. l, bodies of the vertebrse ; 2, spinousprocesses-of the vertebrae : 3, spinalcanal; 4, breast-bone ; 5, diaphragm;6, thorax ; 7, abdomen. Fig. 74.—The Diaphragm, &e. t, sixth dorsal vertebra; b, fourth lumbar vertebra,;c, lower cartilaginous extremity of the breast-bone(ensiform cartilage) ;dt£, a great blood-vessel (aorta)passing through the diaphragm; e, oesophagus;/, opening through which a great vein (inferior venacava) passes ; 1, 2, and 3, tendinous portion of thediaphragm : 4 and 5, muscular portion of the dia-phragm ; 6 and 7, the pillars of the are powerful muscles which connect the ten-dinous portion of the diaphragm with the spinalcolumn. 8, 9, and 10, intercostal muscles. Now insert the point of a knife just at the lower extremity of the sternum,and cut through that bone toward the throat, thrusting the knife no deeperthan is absolutely necessary. The front walls of the cavity, consisting of t
Size: 1594px × 1568px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondon, booksubject
