Vagina

The vagina is a muscular canal lined with mucosal tissue, located inside a woman's body. It connects the cervix (opening of the uterus) to the external genital opening between the labia. The vagina has three primary functions: it is the passage through which menstrual discharge exits the body, the site of sexual intercourse, and the birth canal through which a fetus passes during natural childbirth.

In everyday Somali, the word "siil" is used broadly and sometimes refers to the external genital structures (labia, clitoris) that medical terminology designates as the vulva. Medical texts distinguish between the two: the vagina is the internal canal, while the external structures are termed the external genitalia.

Structure

The vaginal wall consists of three layers: an inner mucosa that is elastic and allows for expansion, a muscular layer (smooth muscle), and an outer connective tissue layer. The mucosal layer secretes fluid that protects the body and reduces friction. The vagina is naturally moist, with its walls touching when empty, but it can expand considerably.

Bacterial flora and acidity

The vagina is home to a population of beneficial bacteria, particularly Lactobacillus species. These bacteria produce lactic acid, which maintains an acidic pH. This acidic environment inhibits the growth of harmful bacteria and fungi. When the natural balance is disrupted—through antibiotic use or vaginal douching, for example—conditions such as bacterial vaginosis or candida (yeast) infection can develop.

Childbirth and life changes

During pregnancy, hormones and pressure from the developing fetus cause the vagina to become highly expandable to allow passage of the infant. After childbirth, the tissues and muscles generally return to their previous state, although permanent changes can occur. When a girl reaches menstrual age, the hormone estrogen increases the elasticity of the mucosal lining. After menopause, declining estrogen can cause dryness and thinning of the tissue.

Health and examination

The vagina cleanses itself through the secretion of fluid. General health guidance recommends against douching and the use of scented products, as these disrupt the pH balance. Gynecological examination uses an instrument called a speculum to visualize the cervix; a Pap smear test screens for cellular changes that may lead to cervical cancer. Sexually transmitted infections such as chlamydia and gonorrhea often produce no symptoms, so regular screening is recommended for those at risk.