Perineum

perinealperineal bodyanogenitalperineal areaanogenital areaperianal skinperineal regionTaintanal/genital regionBiffins Bridge
The perineum is the space between the anus and scrotum in the male and between the anus and the vulva in the female.wikipedia
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Vulva

pudendal cleftexternal female genitaliacunnus
The perineum is the space between the anus and scrotum in the male and between the anus and the vulva in the female.
Other features of the vulva include the pudendal cleft, sebaceous glands, the urogenital triangle (anterior part of the perineum), and pubic hair.

Scrotum

scrotalscrotal skinprescrotal
The perineum is the space between the anus and scrotum in the male and between the anus and the vulva in the female.
It is a distention of the perineum and carries some abdominal tissues into its cavity including the testicular artery, testicular vein, and pampiniform plexus.

Episiotomy

episiotomiescut during childbirthmaking a cut in the vagina
Perineal tears and episiotomy often occur in childbirth with first-time deliveries, but the risk of these injuries can be reduced by preparing the perineum, often through massage.
Episiotomy, also known as perineotomy, is a surgical incision of the perineum and the posterior vaginal wall generally done by a midwife or obstetrician.

Human anus

anusanalanal area
It is a diamond-shaped area that includes the anus and, in females, the vagina.
It is located behind the perineum which is located behind the vagina or scrotum.

Erogenous zone

erogenous zoneserogenousErogenic Zones
The perineum is an erogenous zone for both males and females.
Specific zones are associated with sexual response, and include the lips and nipples in addition to areas of the genitals, notably the foreskin and corona of the glans penis, clitoris and rest of the vulva, and perianal skin.

Vagina

birth canalvaginalvaginal opening
It is a diamond-shaped area that includes the anus and, in females, the vagina.
The urogenital triangle is the front triangle of the perineum and also consists of the urethral opening and associated parts of the external genitalia.

Urogenital triangle

The perineal body (or central tendon of perineum) is a pyramidal fibromuscular mass in the middle line of the perineum at the junction between the urogenital triangle and the anal triangle.
The urogenital triangle is the anterior part of the perineum.

Anal triangle

The perineal body (or central tendon of perineum) is a pyramidal fibromuscular mass in the middle line of the perineum at the junction between the urogenital triangle and the anal triangle.
The anal triangle is the posterior part of the perineum.

Childbirth

laborbirthlabour
Perineal tears and episiotomy often occur in childbirth with first-time deliveries, but the risk of these injuries can be reduced by preparing the perineum, often through massage.
Following the birth, if the mother had an episiotomy or a tearing of the perineum, it is stitched.

Coccyx

tailbonecoccygealtail bone
The perineum is the region of the body between the pubic symphysis (pubic arch) and the coccyx (tail bone), including the perineal body and surrounding structures.
The coccygeal fossa is a shallow depression (fossa) on the surface between the sacrum and the perineum, located in the intergluteal cleft that runs from just below the sacrum to the perineum.

Bulbospongiosus muscle

bulbospongiosusbulbocavernosusbulbocavernosus muscle
2. Bulbospongiosus muscle
The bulbospongiosus muscle (bulbocavernosus in older texts) is one of the superficial muscles of the perineum.

Superficial perineal pouch

Superficial
The superficial perineal pouch (also superficial perineal compartment/space/sac) is a compartment of the perineum.

Levator ani

pubococcygeus musclepubococcygeuspuborectalis
Its rupture during vaginal birth leads to widening of the gap between the anterior free borders of levator ani muscle of both sides, thus predisposing the woman to prolapse of the uterus, rectum, or even the urinary bladder.
The middle fibers are inserted into the side of the rectum, blending with the fibers of the sphincter muscles; lastly in the male, the anterior fibers descend upon the side of the prostate to unite beneath it with the muscle of the opposite side, joining with the fibers of the external anal sphincter and transverse perineal muscles, at the central tendinous point of the perineum.

Ischiocavernosus muscle

ischiocavernosus
The ischiocavernosus muscle or erectores penis by old Anatomists, is a muscle just below the surface of the perineum, present in both men and women.

Perineal membrane

inferior fascia of the urogenital diaphragmfibrosainferior
The perineal membrane is an anatomical term for a fibrous membrane in the perineum.

External anal sphincter

anal sphincterSphincter ani externus muscleSphincter ani externus
1. External anal sphincter
(3) Taking its fixed point at the coccyx, it helps to fix the central point of the perineum, so that the bulbospongiosus muscle may act from this fixed point.

Transverse perineal muscles

superficial transverse perineal muscleDeep transverse perineal muscleTransversus perinei superficialis
3. Superficial transverse perineal muscle
The superficial transverse perineal muscle (transversus superficialis perinei) is a narrow muscular slip, which passes more or less transversely across the perineal space in front of the anus.

Deep perineal pouch

Deep perineal spacedeep perineal sac
The deep perineal pouch (also deep perineal space) is the anatomic space enclosed in part by the perineum, and located superior to the perineal membrane.

Ischioanal fossa

ischiorectal fossaIschio-anal fossa
It is somewhat prismatic in shape, with its base directed to the surface of the perineum, and its apex at the line of meeting of the obturator and anal fasciae.

Pudendal nerve

Pudendalinternal pudendal nervenerve
The pudendal nerve is the main nerve of the perineum.

Pelvic floor

pelvic diaphragmpelvic floor musclespelvic muscles
The perineal body is essential for the integrity of the pelvic floor, particularly in females.
The pelvic floor separates the pelvic cavity above from the perineal region (including perineum) below.

Anal canal

anal vergeanal tract
It lies in the anal triangle of perineum in between the right and left ischioanal fossa.

Urogenital diaphragm

Specifically, when a retrograde urethrogram demonstrates extension of contrast from the proximal bulbous urethra into the perineum, there is an increase of grading of the injury from a Type 2 to a Type 3 classification.

Husband stitch

more stitchesthe husband's stitch
There are claims that sometimes the perineum is excessively repaired after childbirth, using a so-called "husband stitch" and that this can increase vaginal tightness or result in pain during intercourse.
The husband stitch or husband's stitch, also known as the daddy stitch, husband's knot and vaginal tuck, is a purported surgical procedure in which one or more sutures than necessary are used to repair a woman's perineum after it has been torn or cut during childbirth.

Perineal raphe

Median Raphemedian raphéraphe
The perineal raphe is a visible line or ridge of tissue on the human body that extends from the anus through the perineum.