
	3D Medical Animations Close This information is provided by an independent source. Merck & Co. does not endorse and is not responsible for the accuracy of the content, or for the practices or standards of non-Merck sources. This information provided is not intended to be a substitute for professional medical advice. A licensed healthcare professional should be consulted for diagnosis and treatment of any and all medical conditions. The manufacturer of a product generally has the most complete information about that product. How to use How to use The world's largest library of 3D medical animations developed and copyrighted by Blausen Medical Communications. The Human Atlas figures rotating model, labeled slides, and printable text in addition to animated videos. Shows a video of the selected health topic. Controls play, pause, and restart of the video. Shows a summary of the selected health topic. Controls to scroll the text. Shows a 3 D model of the video. Controls to rotate the model. Shows slides from the video. Controls to change slides.

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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.

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vagina (vә-ji´nә) pl. vagi´nae any sheath or sheathlike structure.
the canal in the female that extends from the external genitalia (vulva) to the cervix uteri. The adult vagina is normally about 8 cm (3 in) long and slopes upward and backward. Internally, the bladder is in front of the vagina and the rectum in back. The vagina receives the erect penis in coitus; spermatozoa are discharged into it, swim through the cervical canal, and enter the uterus. The vagina is also the passage for menstrual discharge, and it functions as the birth canal. Its interior lining is mucous membrane, and muscles and fibrous tissue form its walls. In pregnancy, changes occur in these tissues, enabling the vagina to stretch to many times its usual size for childbirth.

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