The principles of midwifery; including the diseases of women and children / [John Burns].

  • John Burns
Date:
1809
Catalogue details

Licence: Public Domain Mark

Credit: The principles of midwifery; including the diseases of women and children / [John Burns]. Source: Wellcome Collection.

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    The pelvis consists, in the full grown female, of three large bones, two of which are very irregular, having no near resemblance to any other object; on which account they have been called the ossa innominata. These form the sides and front of the bason or pelvis. The back part consists of a triangular bone, called the os sacrum, to the inferior extre- mity or apex of which, is attached, by a moveable articula- tion, a small bone, which, from its supposed resemblance to the beak of a cuckoo, has been named the os coccygis. The os innominatum, at first, consists of three separate pieces: the upper portion is called the ilium, or haunch bone; the,under portion the ischium, or 'seat bone; and the ante- rior division, which is the smallest of the three, is called the os pubis, or share bone. These all join together in the ace- tabulum, or socket formed for receiving the os femoris, and are connected by a very firm gristle or cartilage. This, be- fore the age of puberty, is converted into bone, so that the three different pieces are consolidated into one, though the names given to the bones originally are still applied to the different parts of the united os innomipatum. The sacrum also, which seems to consist only of one curv- ed triangular bone, is really made up of several pieces, which, in the child, are nearly as distinct as the vertebrje, to which, indeed, they bear such a resemblance, that they have been considered as a continuation of them; but from their imperfect structure, and subsequent union, they have been called the false vertebrae. The bones of the pelvis are firmly joined together, by means of ligaments and intermediate cartilages, and form a very irregular canal, the different parts of which must be briefly mentioned. SECTION SECOND. When we look at the pelvis, we observe, that the ossa in- nominata naturally divide themselves into two parts, the upper of which is thin and expanded, irregularly convex on its dor- sum or outer surface, hollow on the inside, which is called the costa, and bounded by a broad margin, extending in a se-
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