An analytical compendium of the various branches of medical science : for the use and examination of students / by John Neill and Francis Gurney Smith.

  • John Neill
Date:
1848
Catalogue details

Licence: Public Domain Mark

Credit: An analytical compendium of the various branches of medical science : for the use and examination of students / by John Neill and Francis Gurney Smith. Source: Wellcome Collection.

Provider: This material has been provided by the University of Massachusetts Medical School, Lamar Soutter Library, through the Medical Heritage Library. The original may be consulted at the Lamar Soutter Library at the University of Massachusetts Medical School.

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    2] apex presents a cordiform opening, and the opening at the base has a large notch in front. Fig. 7. STERNUM. Is an oblong, slightly- curved bone, placed in front of the thorax. Usually it consists of three pieces, but in advanced life of but one. The first or superior bone,* is the thickest, and resembles in shape a trian- gle with the corners cut oft, the base being upwards; on the superior edge is a concavity for the benefit of the movements of the tra- chea ; on each side is a large concavity for the ar- ticulation of the clavicle, and below are two smaller ones for the articulation of the first, and part of the second rib. The second bone^ is longer and narrower than the first, increasing in breadth in its lower extremity ; its sides present pits for the articulation of part of the second, the third, fourth, fifth, sixth, and part of the seventh ribs. The tliird bone,^ is very frequently cartilaginous, and called xyphoid or ensiform ; its shape varies ; sometimes being pointed, and sometimes bifurcated ; upon its side is a depression for a portion of the seventh rib. RIBS. These are twenty-four in number, twelve on cither side; those that articulate with the sternum are called true ribs, and are seven in number; the five below them are called false ribs : in some rare instances there have been thirteen or eleven ribs on one side. They are parallel, and directed obliquely downwards and forwards ; each having a parabolic curve, and gradually increasing in size until the eighth, afterwards gradually diminishing. The anterior or sternal extremity is larger and flatter than the j)Osteilor ; the posterior or vertebral extremity presents a spherical head, having two articular surfaces separated by a ridge ; surrounding the head, the rib is very narrow and called the neck, the upper edge of which is sharp for the insertion of the internal transverse liga-