. Anatomy, descriptive and applied. Anatomy. THE PELVIS 219 width of the fore part of the pelvic outlet is much increased and the passage of the fetal head facilitated. The size of the pelvis varies not only in the two sexes, but also in different members of the same sex. This does not appear to be influenced in any way by the height of the individual. Women of short stature, as a rule, have broad pelves. Occasionally the pelvis is equally contracted in all its dimensions, so much so that all its diameters measure an inch less than the average, and this even in women of average height and othe
. Anatomy, descriptive and applied. Anatomy. THE PELVIS 219 width of the fore part of the pelvic outlet is much increased and the passage of the fetal head facilitated. The size of the pelvis varies not only in the two sexes, but also in different members of the same sex. This does not appear to be influenced in any way by the height of the individual. Women of short stature, as a rule, have broad pelves. Occasionally the pelvis is equally contracted in all its dimensions, so much so that all its diameters measure an inch less than the average, and this even in women of average height and otherwise well formed. The principal divergences, however, are foimd at the inlet, and affect the relation of the antero- posterior to the transverse diameter. Thus we may have a pelvis the inlet of which is elliptical either in a transverse or antero-posterior direction; the trans- verse diameter in the former and the antero-posterior in the latter greatly exceeding the other diameters. Again, the inlet of the pelvis in some instances is seen to be almost circular. The same differences are found in various races. European women are said to have the most roomy pelves. That of the negress is smaller, circular in shape, and with a narrow pubic arch. The Hottentots and Bushwomen possess the smallest Fig. 174.—Diameters of the pelvic outlet in the female. In the fetus and for several years after birth the pelvis is small in proportion to that of the adult. The cavity is deep and the projection of the sacrovertebral angle less marked. The generally accepted opinion that the female pelvis does not acquire its sexual characters until after puberty has been shown by recent observations^ to be erroneous, the characteristic differences between the male and female pelvis being distinctly indicated as early as the fourth month of fetal life. At birth these differences are distinct (Romiti), the female pelvis possessing less straight ilia, a broader subpubic arch, and less height tha
Size: 1976px × 1265px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
