. On the theory and practice of midwifery . he os uteri, an inch and oneeighth; thickness, including both lips, three quarters of an inch. Thelength of the transverse chink, or os uteri, from three eighths to half aninch; each lip is three-eighths of an inch thick, though the posterior issaid to be thinnest. From the margin of the lip to the top of the f2 66 INTERNAL ORGANS OF GENERATION. cervix is an inch, but sometimes only three quarters, or even less. Fromthe top of the triangular cavity of the fundus to the end of the narrowcylindrical cavity of the body is an inch and one-eighth; the ext
. On the theory and practice of midwifery . he os uteri, an inch and oneeighth; thickness, including both lips, three quarters of an inch. Thelength of the transverse chink, or os uteri, from three eighths to half aninch; each lip is three-eighths of an inch thick, though the posterior issaid to be thinnest. From the margin of the lip to the top of the f2 66 INTERNAL ORGANS OF GENERATION. cervix is an inch, but sometimes only three quarters, or even less. Fromthe top of the triangular cavity of the fundus to the end of the narrowcylindrical cavity of the body is an inch and one-eighth; the extremebreadth of the top of the cavity stretching from the entrance of one tubeto that of the other is nearly an inch and a half. According to the calculations of Levret, its superfices may be reckonedat sixteen inches, and its cavity at eleven twelfths, or about three quartersof a cubic inch. The weight of a virgin uterus, according to Meckel, is from seven toeight drachms; but after child-bearing, it amounts to an ounce and ahalf. Fig. 81. The Os Uteri or Os Tincce, is situated at the lower part of thecervix, varying in form in different individuals ; in many it is a transversechink or slit, in others a circular opening, and in some triangular, resem-bling a leech-bite, especially in those who have borne many is generally about the size of a goose-quill, or rather smaller. The Canal of the Cervix is from half to three quarters of an inch long,leading from the os uteri; it first widens, and then contracts again whereit enters the cavity of the uterus, marking the os uteri internum, as it hasbeen called. Between the os uteri externum and internum the mucousmembrane is curiously disposed in rugae, branching out from a centralline; this has been called the arbor vitce. The internal surface of thiscanal is thickly studded with mucous follicles, called glandulee JYabothi,and which, after impregnation, secrete a thick mucus which blocks up thecanal. The cavity of the
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