PAPER Topics

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The vagina is a thin walled-tube, 8 to 10 cm long. It lies between the bladder & the rectum & extends from the cervix to the body exterior. The urethra is embedded in its anterior wall. Often called the birth canal, the vagina provides a pas ....

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... during intercourse. The vaginal mucosa has no glands; it is lubricated by the cervical mucous glands. Its epithelial cells release large amounts of glycogen, which is anaerobically metabolized to lactic acid by resident bacteria. Consequently, the pH of a woman’s vagina is normally quite acidic. This acidity helps keep the vagina healthy & free of infection, but it is also hostile to sperm. Although vaginal fluid of adult woman is acidic, it tends to be alkaline in adolescents, predisposing sexually active teenagers to sexually transmitted diseases. In virgins, the mucosa near the distal vaginal orifice forms an incomplete partiti ...