Male & Female Perineum - Week 7
Terms in this set (69)
perineal raphe, scrotal raphe, penile raphe
___is the sagittal ridge of skin in perineum that extends between anus and vulva in females; in males it continues from the anus on to the scrotum as the ___and the penis as the ____
the urogenital triangle is closed by the _____which also closes the urogenital hiatus from below
superior, inferior (perineal membrane), sphincter urethrae (external urethral sphincter), deep transverse perineal
the urogenital triangle has a connective tissue part composed of ____and ____fascia and a muscular part composed of 2 deep muscles: ____&____ which are surrounded by the fascia.
fibromuscular mass at midpoint of line joining the ischial tuberosities that is the site of many muscle attachments
deep and superficial transverse perineal, bulbospongiosus, external anal sphincter, external urethral sphincter, levator ani, muscular coat of anal canal
What 7 muscles attach at the perineal body?
the perineal fascia has 2 layers, the superficial and deep. the superficial is further divided into a fatty layer continuous with _____of the abdominal wall and a membranous layer which is continuous with ____fascia of the abdominal wall
labia majora, mons pubis, Camper's
in females, the fatty layer of the superficial perineal fascia forms the ____&_____. It is continuous with the _____layer of superficial fascia of the abdomen
dartos fascia of scrotum and penis, Scarpa's
in males, the membranous (Colle's) layer of the superficial perineal fascia forms the
______and continues into the ____fascia of the abdominal wall.
superficial perineal, deep perineal
there are 2 spaces in the perineum, known as the _____and _____spaces.
membranous layer of superficial perineal fascia (Colle's fascia), inferior fascia of urogenital triangle (perineal membrane)
Between what fascia layers is the superficial perineal space found?
superior and inferior fascia of urogenital diaphragm
Between what layers of fascia is the deep perineal space found?
skin, superficial fatty layer of superficial perineal fascia, deep membranous layer of superficial perineal fascia, deep perineal fascia investing bulbospongiosus & ischoicavernosus, superficial perineal space, inferior fascia of urogenital diaphragm, deep perineal space, superior fascia of urogenital diaphragm
What are the 8 layers of the perineum?
the inferior fascia of the urogenital diaphragm forms the ______.
superficial perineal, deep perineal, external anal sphincter
the muscles of the perineum include the 2 groups in the urogenital triangle, _____and ____along with the one muscle of the anal triangle: _____
superficial transverse perineal, bulbospongiosus, ischiocavernosus
What are the 3 muscles of the superficial group in the superficial perineal space?
sphincter urethrae, deep transverse perineal
What are the 2 muscles of the deep group in the deep perineal space?
All muscles of the perineum are innervated by what nerve?
ischiocavernosus, bulbospongiosus, superficial transverse perineal muscle, deep perineal branches of internal pudendal vessels and pudendal nerve, proximal penile urethra, bulb and crura of penis
In males, what are the 7 structures found in the superficial perineal space (pouch)?
crura of clitoris, ischiocavernosus, superficial transverse perineal muscle, bulbospongiosus, bulb of vestibule, greater vestibular glands, deep perineal branches of internal pudendal vessels and nerve
In females, what are the 7 structures found in the superficial perineal space (pouch)?
sphincter urethrae, deep transverse perineal muscle, membranous urethra, bulbourethral glands, dorsal neurovascular structures of penis
In males, what are the 5 structures found in the deep perineal space (pouch)?
sphincter urethrae, sphincter urethrovaginalis & compressor urethrae muscles, deep transverse perineal muscle, urethra, dorsal neurovascular structures of clitoris, vagina
in females, what are the 6 structures found in the deep perineal space (pouch)?
anus, external anal sphincter, ischioanal fossa (and contents), pudendal canal (and contents)
What are the 4 major structures of the anal triangle?
fascia lined wedge-shaped space on both sides of anal canal and rectum between skin of anal region inferiorly and pelvic diaphragm superiorly
ischioanal fat pad, inferior anal/rectal vessels, inferior rectal branch of pudendal, posterior femoral cutaneous nerve branch, perforating cutaneous branches of S2 & S3, perineal branch of S4
What are the contents of the ischioanal fossa?
pudendal nerve, internal pudendal vessels, nerve to obturator internus
What are the contents of the pudendal canal?
scrotal skin, tunica dartos, external spermatic fascia, cremaster muscle and fascia, internal spermatic fascia, tunica vaginalis (periorchium, epiorchium), scrotal cavity
What are the 7 layers of the scrotum?
excessive accumulation of fluid in the scrotal cavity
anterior scrotal (external pudendal), posterior scrotal (internal pudendal), cremasteric (inferior epigastric)
What are the 3 arteries that supply that scrotum and where do they branch from?
superficial inguinal; deep inguinal and external iliac
What lymph node does the scrotum and most of the penis drain into? What nodes does the glans drain into?
ilioinguinal, genitofemoral, perineal branch of pudendal, posterior femoral cutaneous
What 4 nerves provide innervation to the scrotum?
crura, bulb, ischiopubic rami
the root of penis includes the two ____around a ____which are masses of erectile tissue connected to the _____
corpora cavernosa, corpus spongiosum
in the body of the penis, the penile septum separates the ____, a continuation of the crura. a single _____, a continuation of the bulb, encloses the urethra.
glans, foreskin (prepuce), neck
the ___is the expanded end of corpus spongiosum covered by the _____and separated from rest of the shaft by the ____.
corona glandis, external urethra orifice
____is the prominent margin of glans adjacent to the penile neck. ______is located at the tip of the glans
the corona glandis and neck of the penis contain a ____sebaceous gland which secretes _____to lubricate inner foreskin.
superficial (Colle's or Dartos), Buck's (deep)
the penis is enclosed in ____fascia which is responsible for shrinkage of skin in the absence of an erection and the ____which binds the corpora cavernosa, spongiosum, vessels, and nerves together.
What are the 2 ligaments of the penis?
superficial (Camper's) superficial
the fundiform ligament of the penis is a condensation of ____fascia that blends with the ______fascia of penis.
deep (Scarpa's), Buck's (deep)
the suspensory ligament of the penis is a condensation of ____fascia which forms a sling attaching to the pubic symphysis and blends with the ____fascia of penis.
deep artery of the penis, dorsal artery of the penis, bulbar, urethral
What are the 4 artery branches from internal pudendal which supply the penis?
Veins of the same name drain the penis.
smaller branches of arteries which supply the corpora cavernosa
dorsal nerve of the penis, deep branches of perineal
the ____branch of pudendal supplies the skin and glans of the penis while the ____supplies the bulb and corpus spongiosum.
pudendal (dorsal and deep branches of perineal), ilioinguinal
What nerves provide somatic innervation to the penis?
greater and lesser cavernous, T10-T12
the parasympathetic innervation of the penis is from the ______nerves of the prostatic plexus and the sympathetic comes from ____-___.
the ____part of the membranous urethra opens in to the bulbourethral (Cowper's) glands
membranous, deep perineal space
what part of urethra is most liable to rupture? Where would urine enter?
internal urethral orifice, membranous part surrounded by sphincter urethrae, external urethral orifice
What are the 3 constrictions of the male urethra?
prostatic part, intrabulbar part, navicular fossa
What are the 3 widenings of the male urethra?
prostatic sinuses, prostatic utricle, ejaculatory ducts
at the urethral crest, there are lateral grooves known as ____where the ducts of the prostate glands drain into. At the middle of the crest, the seminal colliculus contains three openings, the _____and _____.
scrotum, penis, anterior abdominal wall
If the penile urethra is ruptured, where would urine spread to?
clitoral prepuce, frenulum of clitoris
anteriorly, the lateral parts of the labia minora join to form the ____while the medial parts form the _____.
labia majora, frenulum of labia (fourchette)
the labia minora end posteriorly by joining the _____. in virgins the posterior right & left labia minora are interconnected by the ____
vagina, urethra, greater and lesser vestibular glands
What are the components of the vestibule of the vagina?
vestibular (navicular) fossa
shallow depression between orifice of vagina and frenulum of labia in the vestibule
masses of erectile tissue on each slide of vaginal orifice covered by the bulbospongiosus muscle
crura, body, glans
What are the 3 parts of the clitoris?
anterior labial (external pudendal), posterior labial (internal pudendal)
What is the blood supply of the labia and what branches does it come from?
deep artery of clitoris (internal pudendal)
What is the blood supply of the crura and corpora cavernosa of the clitoris?
dorsal artery of clitoris (internal pudendal)
What is the blood supply of the glans of the clitoris?
artery of bulb of vestibule, anterior vaginal (internal pudendal)
What is the blood supply of the bulb of the vestibule and Bartholin's glands?
anterior labial (ilioinguinal), posterior labial (pudendal), genital branch (genitofemoral), perineal branches (posterior femoral cutaneous)
What is the somatic innervation of the labia?
dorsal nerve of clitoris (pudendal)
What is the somatic innervation of the clitoris?
What is the autonomic innervation of the labia minora and bulb of the vestibule?
cavernous nerve (uterovaginal plexus)
What is the autonomic innervation of the clitoris?
What lymph nodes to external female genitalia organs drain into?
sphincter urethrae, urethrovaginalis, compressor urethrae
What are the 3 parts of the external sphincter of the female urethra?
What muscle controls the internal urethral orifice?
the female urethra is fused with anterior vaginal wall by the connective tissue _______.
urethral carina (G spot)
most caudal part of urethrovaginal septum between urethral and vaginal orifices in the vestibule where the skene's gland open is known as the _____