Identifier: treatiseonpracti00boen (find matches)
Title: A treatise on practical anatomy: for students of anatomy and surgery
Year: 1891 (1890s)
Authors: Boenning, Henry C
Subjects: Anatomy
Publisher: Philadelphia and London, F. A. Davis
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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Below the mucous membrane ofthe vestibule is a quantity of erectile tissue arranged inthe form of two bulbs connected by an intermediate por-tion. The pelvic or internal genito-urinary organs arethe bladder, urethra, vagina, uterus. Fallopian tubes, ova-ries, and associate parts. THE URETHRA. The urethra is a membranous canal about one and ahalf inches in length. It extends from the neck of thebladder to the meatus. It runs in the anterior wall ofthe vagina, is about one-quarter of an inch in diameter,but highly distensible, and has three coats,—muscular,erectile, and mucous. The erectile coat is analogous to the corpus spongiosum of the male. THE VAGINA. 405 THE VAGINA. The vagina is a curved cylindrical canal which ex-tends from the vulva to the uterus. It is about fourinches along the anterior and six inches along the pos-terior wall, and is attached above to the cervix uteri.Its orifice is the most constricted portion. It presentsthree coats,—erectile, muscular, and mucous. The
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Fig. 173.—Natural Position of the Pelvic Organs, with Full Bladder. erectile coat consists of an abundant venous plexus,supported by connective tissue. The muscular coat hasan outer circular and an inner, thick, longitudinal layerof fibres. The mucous membrane is loosely attached to the muscular coat, presents anteriorly and posteriorly avertical column, from which pass off numerous transverserugae. They are all obliterated when the organ is dis-tended. The epithelium of the vagina is of the squa- 406 PRACTICAL ANATOMY. mous variety. The vagina is interposed between thebladder and rectum. It corresponds to the axis of thepelvis, but is a movable organ, and its position is influ-enced by the degree of distension of either the bladderor rectum. On section, its walls are seen to be in con-tact, and it appears as a transverse slit. THE UTERUS. The uterus is the organ of gestation. It is a mus-cular organ, having thick walls and a small cavity. In the virgin, it ispear-shaped and setsin t

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