. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. UTERUS —(NORMAL ANATOMY). 633 largest portion, while in the cervix the fibrous element predominates, and the muscular fibre is proportionally less abundant. Course of the muscular fibres. — Regarding the precise plan of arrangement of the consti- tuent tissues of the middle uterine coat, and especially of its muscular element, in the unimpregnated state, numerous microscopic examinations have satisfied me that it is not possible to do more than to indicate these in a very general manner. Mine. Boivin at- tempted to descr
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. UTERUS —(NORMAL ANATOMY). 633 largest portion, while in the cervix the fibrous element predominates, and the muscular fibre is proportionally less abundant. Course of the muscular fibres. — Regarding the precise plan of arrangement of the consti- tuent tissues of the middle uterine coat, and especially of its muscular element, in the unimpregnated state, numerous microscopic examinations have satisfied me that it is not possible to do more than to indicate these in a very general manner. Mine. Boivin at- tempted to describe the special course of the muscular fibres in the unimpregnated organ; but she appears to have abandoned the at- tempt alter giving an account of what is seen upon the surface of the organ when the peri- toneum has been stripped off after prolonged maceration. More recently the course of these fibres has been described by Kolliker, Gerlach, and others, in the deeper seated, as well as in the superficial layers. In investigating this part of the subject it appears to me that a sufficient distinction has not been made between the course of the in- dividual fibres, and the arrangement of the lamina,' or bundles into which they are col- lected, for these are by no means necessarily the same. According to my observations the contrac- tile fibre-cells are not distributed in equal pro- portions through all parts of the muscular coat, nor are they found everywhere in the same condition. It has been already stated, that no strict line of demarcation is discern- ible by the microscope between the three several coats, of which the uterus is said to consist. And this is particularly the case in respect of the muscular fibres which permeate all of them. In the so-called mucous mem- brane the muscular fibre-cells are loosely ar- ranged in an amorphous tissue, in which they lie embedded, intermixed with the elementary nuclear corpuscles, constituting their embry- onic condition. Here
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