Rib (anatomy)

“ On the left side of the abdominal cavity is the spleen, while to the right of the stomach is the liver, whose function is the purification of the blood and the secretion of the bile, which is so useful for digestion.
In the hollow space enclosed by the ribs are situated the heart and the lungs. The heart is between the two lungs, but more to the left than the right. There are on the whole 24 bones in the chest; the action of the heart can be felt between the fifth and the sixth rib. ”

“ In like manner, when the ribs are fractured, whether one or more, provided there be no splinters, there is rarely fever, spitting of blood, and sphacelus, and ordinary treatment without evacuation will suffice, provided there be no fever;-bandaging, according to rule; and the callus forms in twenty days, the bone being of a porous nature. But in cases of contusion, tubercles form, along with cough, suppurating sores, and sphacelus of the ribs, for nerves from all the parts run along each rib. ”

“ It must be kept stretched, just as Nature arranged that it should, like a drum-head. It is attached all around to the chest, though it crosses five or six ribs on its descent from the seventh rib to the sternum at the lower point and down to fourth lumbar vertebra. It is a continuous slanting floor, above bowels and abdominal organs, and below heart and lungs. It must, by all reason, be kept normal in tightness at all places, without a fold or wrinkle, that could press the aorta, nerves, œsophagus, or anything that contributes to the supply or circulation of any vital substance. ”

“ In health it is difficult to pass the fingers sufficiently under the hypochondriac circle to reach the liver; but in case of morbid hypertrophy it extends more or less beyond the last rib, and palpation between the last ribs sometimes reveals abnormal sensibility. ”

“ In the rib action, above alluded to, the lower ribs are controlled by the diaphragm which draws them slightly downward, while other muscles hold them in place and the intercostal muscles force them outward, which combined action increases the mid-chest cavity to its maximum. In addition to this muscular action, the upper ribs are also lifted and forced outward by the intercostal muscles, which increases the capacity of the upper chest to its fullest extent. ”

“ This last rib, when shut, flaps under the upper one, and also falls down with it before to the waist, but is not joined to the ribs below. Along the whole spine-bone runs a strong, flat, broad, grisly cartilage, to which are joined several other of these ribs; all which open horizontally, and are filled in the interstices with the above membrane, and are jointed to the ribs of the person just where the plane of the back begins to turn towards the breast and belly; and, when shut, wrap the body round to the joints on the contrary side, folding neatly one side over the other. ”

“ The back-ribs make an excellent roast; indeed, there is not a sweeter or more varied one in the whole carcass, having both ribs and shoulder. The shoulder-blade eats best cold, and the ribs, warm. The ribs make excellent chops, the Leicester and South-Down affording the best. The breast is mostly a roasting-piece, consisting of rib and shoulder, and is particularly good when cold. When the piece is large, as of the South-Down or Cheviot, the gristly parts of the ribs may be divided from the true ribs, and helped separately. ”

“ If the effusion increases until it reaches as high as the second rib, the respiratory movements are scarcely perceptible to the eye. When it reaches its maximum, the clavicle, they appear to be arrested, but the vertical diameter is slightly altered by the action of the intercostal muscles as they endeavor to elevate the ribs, and of the diaphragm as it feebly contracts and relaxes. The pleural cavity, which in health is lubricated by about two drachms of moist serous secretion, is frequently filled to the extent of seventy, eighty, or more—even to one hundred and twenty—ounces. ”

“ The sternal ribs are better developed than in any other mammals, and in the anteaters and †ground-sloths they articulate with the breast-bone by regular synovial joints, and each rib has head and tubercle like a vertebral rib.
In the limbs and feet there is great variety, according to the manner of their employment. The shoulder-blade has a very long acromion and very large coracoid, which long remains separate from the scapula; collar-bones are very generally present, though often in much reduced condition. ”

“ The rib develops from the ends of the vertebral bows, which, coming in contact with the muscle plates of their own segment of the body, are by the resulting bulging forced to expand, and later come together through the formation of the breastbone. ”

“ After the expansion of the chest, the muscles that elevated the ribs relax, together with the diaphragm. The elasticity of the cartilages of the ribs depresses them, and the cavity of the chest is diminished, attended by the expulsion of a portion of the air from the lungs. At the same time, the muscles that form the front walls of the 220 abdominal cavity, contract, and press the alimentary canal, stomach, and liver, upward against the diaphragm ”

“ The track of the bullet between the point at which it had fractured the eleventh rib and that at which it entered the first lumbar vertebra was considerably dilated, and the pus had burrowed downward through the adipose tissue behind the right kidney, and thence had found its way between the peritoneum and the right iliac fossa, making a descending channel, which extended almost to the groin. The adipose tissue behind the kidney, in [Pg 513] the vicinity of the descending channel, was much thickened and condensed by inflammation. ”

“ The tissue with which they are continuous, which is exactly equivalent to the tissue from which the neural arches originate, is not truly a part of the rib. In the tail, behind the anus and kidneys, the cardinal veins fuse to form an unpaired caudal vein below the aorta, and in this part a fresh series of processes originates on each side from the hæmal tissue adjoining the cartilaginous sheath of the notochord, and eventually, by the junction of the processes of the two sides, a canal which contains the aorta and caudal vein is formed below the notochord. ”

“ When we breathe deeply and endeavour to inspire more than is usual we employ certain muscles which act on the ribs, enlarging the cavity of the chest, and then diminishing it as the expiration occurs. The larger the spaces between the ribs, and the more elastic the ribs themselves, the greater is their possible amount of movement. In us it is very great in the child, great in man, but much less in old age, when the elasticity of the ribs diminishes. ”

“ From this part of each rib a strong flat muscle comes forward on each side, before the viscera, forming the abdominal muscles and uniting in a middle tendon, so that the lower half of each rib which is beyond the origin of this muscle, and which is only laterally connected to it by a loose cellular membrane, is external to the belly of the animal, and is used for the purpose of progressive motion, while that half of each rib which is next the spine, as far as the lungs extend, is employed in respiration. ”

“ A rib is an elongated bone, and as a rule possesses a head, a neck, a tubercle and a shaft. The head usually has two articular surfaces, and is connected to the side of the body of two adjacent thoracic vertebrae ; the neck is a constricted part of the bone, uniting the head to the shaft; the tubercle, close to the junction of the shaft and neck, is the part which articulates with the transverse process of the vertebra. ”

“ The ribs are one- or two-headed, rather strong, but short, rarely reaching half-way round the body. They occur on all the vertebrae of the trunk and on most of those of the tail. One pair of ribs connects one vertebra, the sacral, with the pelvis, of which the ilium and ischium are generally ossified, rarely also a portion of the pubic region. ”

“ But the damage is not done to the heart and lungs alone. The liver is crowded out of place until it sometimes reaches clear across the abdomen and is creased with ruts from the pressure of the ribs upon it. The stomach is also pressed out of place. It belongs close up under the diaphragm, but it is crowded by the pressure down until it lies in the abdominal cavity, as low down, sometimes, as the umbilicus, six or eight inches below where it belongs. ”

“ The five or six lower ribs, called false or floating ribs, are rounder, and approach nearer to nature in their form, thereby affording sufficient space for the heart, stomach, and liver, and some other of the abdominal viscera. ”

“ The indications are that an injury sustained during life was the cause of this defect. There was an ilium, almost perfect; a fragment of the right scapula; the anterior extremity of a rib of the right side, and two hinder portions and one middle portion of ribs resembling more the ribs of a carnivorous animal than those of man. ”

“ It is conceived, that without this freer sweep of the lower ribs, life could not have been maintained, so much would the functions of the heart, and chylopretic viscera have been interrupted. The false ribs descend very low down, on each side, there being scarcely one and a half inch between them and the crest of the ileum. The pelvis is capacious, and on its front aspect presents nothing very extraordinary. ”

“ One of the earliest examples of the introduction of the intermediate rib is found in the nave of Lincoln Cathedral, and there the ridge rib is not carried to the wall rib. It was soon found, however, that the construction of the web was much facilitated by additional ribs, and consequently there was a tendency to increase their number, so that in the nave of Exeter Cathedral three intermediate ribs were provided between the wall rib and the diagonal rib. ”

“ In some cases the softened ribs not only compress the organs of the chest, but are also pressed down upon the abdominal viscera, or even into the pelvis. The symptoms arising from such displacement are at first urgent, as can readily be imagined, and are often treated as inflammatory, to the detriment of the patient. ”

“ In the abdomen we find that most of its organs are single. The liver, stomach, spleen, colon, and small intestine form a series of single organs: each of these may be cleft symmetrically. The kidneys are a pair.
The extent to which the ribs are bared in the figure Plate 22, marks exactly the form and transverse capacity of the thoracic walls. The diaphragm, H H*, has had a portion of its forepart cut off, to show how it separates the thin edges of both lungs above from the liver, G, and the stomach, M, below. ”

“ Ribs.—There are portions of two dorsal ribs preserved on the block of coal with the skull. These show characters very similar to those exhibited by the rib ascribed to Macrerpeton huxleyi Cope, and also those of Metoposaurus diagnosticus von Meyer (242) and Anaschisma. The ribs are solid, heavy, curved, and have a longitudinal groove on the middle of each side. The heads of the ribs in the present specimen are obscured and nothing can be said of them except that they appear to be large. ”

“ It is obvious that, if the diameter of the chest, at its lower and broader part, is diminished by lacing, or any other cause, to the extent of one fourth or one half, the lungs B, B, are pressed in towards the heart, A, the lower ribs are drawn together and press on the liver, C, and spleen, E, while the abdominal organs are pressed downward on the pelvic viscera. ”

“ Abdominal ribs are few in number and are very thin. The true ribs possess capitula and tubercula; those of the neck are very short and directed backwards; in the thoracic region they are long, and some are attached to a broad sternum with a keel and a median anterior process, on the sides of which latter articulate the coracoids. Precoracoids and clavicles are absent. The scapulae are long, sabre-shaped, and turned back as in birds; in Pteranodon they show the unique modification of articulating with special processes of the neural arches of several ankylosed thoracic vertebrae. ”

“ When there is little soft tissue between these parts the ribs are readily prevented from full play. Then not only lung action is impaired, but liver, kidneys and stomach are all compressed and made to relax from their supporting tissues, and tend to fall down confusedly toward the bottom of the abdomen. Hence arises the long train of ills growing commoner daily in all corset-wearing countries: movable kidneys, livers, dropped stomachs and intestines, and above all displaced organs of generation. ”

“ The only difference which I can discover between the regions called thorax and abdomen, in the osseous skeleton, (considering this body morphologically,) results, simply, from the circumstance that the ribs, which enclose thoracic space, have no osseous counterparts in the abdomen enclosing abdominal space, and this difference is merely histological. In man and the mammalia the costal arches hold relation with the pulmonary organs, and these costae fail at that region where the ventral organs are located. ”

“ It is held in its place by five ligaments, four of which are formed by double folds of the peritoneum.
The thin front edge of the liver reaches just below the bony edge of the ribs; but the dome-shaped diaphragm rises slightly in a horizontal position, and the liver passes up and is almost wholly covered by the ribs. In tight lacing, the liver is often forced downward out from the cover of the ribs, and thus becomes permanently displaced. As a result, other organs in the abdomen and pelvis are crowded together, and also become displaced. ”