The vulva is the external part of the female reproductive system. It includes the structures surrounding the openings of the vagina and urethra, as well as the clitoris and the folds of skin called the labia. The vulva protects deeper reproductive and urinary structures, contributes to sexual sensation and arousal, and contains glands that help keep the area lubricated.
The vulva is often confused with the vagina, but they are not the same structure. The vagina is an internal muscular canal that extends from the vaginal opening into the pelvis, while the vulva refers to the external genital structures.
What parts make up the vulva?
The vulva is made up of several connected structures. Their size, shape, color, and degree of visibility vary considerably from person to person, and normal anatomy has a wide range of appearances.
The main structures include the mons pubis, labia majora, labia minora, clitoris, vestibule, urethral opening, vaginal opening, and several glands.
Mons pubis
The mons pubis is the rounded area of fatty tissue over the pubic bone at the front of the pelvis. After puberty, it commonly develops pubic hair.
Its fatty tissue provides some cushioning over the underlying pubic bone. The amount of tissue and the distribution of pubic hair vary naturally among individuals.
Labia majora
The labia majora are the larger outer folds of skin that extend from the mons pubis toward the area between the legs. They contain fatty tissue, sweat glands, and oil-producing glands.
After puberty, the outer surface commonly develops pubic hair. The inner surface is generally thinner and more moist than the outer skin.
The labia majora help protect the more delicate structures located between them, including the labia minora and the openings of the urethra and vagina.
Labia minora
The labia minora are thinner folds of tissue located inside the labia majora. They surround the vestibule, the area containing the urethral and vaginal openings.
The labia minora vary greatly in length, thickness, shape, color, and symmetry. One side may be longer or shaped differently from the other, and the labia may extend beyond the outer labia. These variations are usually normal.
Toward the front, the labia minora join and form folds of tissue around the clitoris. They also contain sensory nerve endings and blood vessels, contributing to sexual sensation.
The clitoris and its role in sexual sensation
The clitoris is a specialized sensory organ whose primary known function is sexual sensation. Although only part of it is visible externally, most of the clitoris extends internally.
The visible portion, called the glans clitoris, is located near the front of the vulva where the labia minora meet. It is often partly covered by a fold of skin called the clitoral hood.
Internally, the clitoris extends backward and divides into structures known as the crura, which attach along the pubic bones. It also includes erectile tissue that becomes engorged with blood during sexual arousal.
The clitoris contains a dense concentration of sensory nerve endings. Stimulation can produce sexual pleasure, and its internal erectile structures also contribute to the physical changes associated with arousal.
The vulvar vestibule contains the main openings
The vestibule is the area between the labia minora. It contains the openings of the urethra and vagina and the openings of several glands.
The external urethral opening, or urethral meatus, is where urine leaves the body. It is located below the clitoris and above the vaginal opening.
The vaginal opening is the entrance to the vagina. It is not necessarily a simple circular opening and can vary considerably in appearance. Tissue around the opening may include remnants of the hymen, a thin and variable rim or fold of tissue that partially surrounds the vaginal opening in many people.
The vagina itself extends internally from this opening toward the cervix and is therefore not part of the vulva.
Vulvar glands and lubrication
Several glands associated with the vulva produce secretions that help maintain moisture and reduce friction.
The greater vestibular glands, commonly called Bartholin glands, are located on either side of the vaginal opening. Their ducts open into the vestibule and can release mucus that contributes to lubrication, particularly during sexual arousal.
The lesser vestibular glands, including glands associated with the urethral area, also contribute secretions. The exact contribution of different glands to overall vulvar and vaginal moisture varies with circumstances.
Vulvar moisture can come from several sources, including glandular secretions and fluid that passes through the vaginal tissues. Therefore, lubrication is not produced by one structure alone.
How the vulva protects the body
One of the vulva’s important functions is protection. Its folds of tissue help shield the openings of the urinary and reproductive tracts from mechanical irritation and the external environment.
The labia also help protect sensitive structures such as the clitoris and the vestibule. Skin and mucosal tissues in the region form a physical barrier, while normal secretions and the local microbial environment provide additional forms of protection.
The vulva is not a completely sealed barrier, however. Its openings provide necessary connections to the urinary and reproductive systems.
How the vulva contributes to sexual function
The vulva plays an important role in sexual response because several of its structures contain sensory nerves and erectile tissue.
The clitoris is the major specialized sensory organ of the vulva. During sexual arousal, increased blood flow causes erectile tissues in the clitoris and surrounding structures to become engorged. The labia can also change in appearance and position as blood flow increases.
Touch and pressure can stimulate sensory nerves throughout the vulva, although sensitivity differs between individuals and between different parts of the vulva.
Sexual sensation does not depend on one universal pattern of stimulation. The anatomy and sensitivity of the vulva vary substantially from person to person.
How the vulva differs from the vagina
The terms vulva and vagina are sometimes used interchangeably in everyday language, but anatomically they describe different regions.
The vulva is external. It includes the labia, clitoris, mons pubis, vestibule, urethral opening, vaginal opening, and associated glands.
The vagina is internal. It is a flexible muscular canal extending from the vaginal opening through the pelvis to the cervix.
This distinction matters because symptoms such as irritation, itching, pain, or swelling can originate in different tissues, and the location of a symptom can provide useful information about which structures are affected.
Why vulvar anatomy looks different from person to person
There is no single appearance that defines a normal vulva. The labia may be short or long, relatively smooth or folded, symmetrical or asymmetrical. The clitoral hood may cover more or less of the clitoris, and skin pigmentation can differ between individuals and between different parts of the same vulva.
Age, puberty, pregnancy, hormonal changes, and other normal biological processes can also affect the appearance and tissues of the vulva.
These differences are normal anatomical variation rather than evidence that one particular shape or size is healthier than another.
