Transcript Urogenital triangle in female + Perineal pouches

1. Describe the boundaries & contents
of urogenital triangle in female.
 2. Recite the parts of the female external
genital organs.
 3. Identify its parts and openings present
in it.
 4. Discuss the features of each part
 5. Discuss the contents of the perineal
pouches in female and male.
 6. Enumerate the structures piercing the
perineal membrane.

BOUNDARIES :
•
•
•
Anteriorly : Symphysis
pubis
Posteriorly : Transverse line
passing through the 2
ischial tuberosities.
Laterally : Ischiopubic rami
& ischial tuberosities.
CONTENTS :
• Lower part of
urethra & vagina.
• External genitalia
(vulva).
Mons pubis : a collection
of fat overlying the pubis.
 Labia majora.: Two folds
of skin containing fatty
tissue and covered with
hair
 Located on either side of
the vaginal opening,
extending from the mons
pubis to the perineum

 Labia
minora.:
› Two thin folds of tissue located within the
folds of the labia majora
 Extends from the clitoris downward
toward the perineum
 Clitoris.:
› Short, elongated organ composed of
erectile tissue
› Located just behind the upper
junction of the labia minora
› Homologous to the penis
 Vestibule
of vagina: The interval between
the two labia minora.

Vagina & urethra open into it through
urethral orifice anteriorly and vaginal
orifice (Also known as the vaginal
introitus), posteriorly.
 Bartholin’s glands
› Located on either side of the vaginal orifice
 Secrete a mucous substance that lubricates
the vagina
Indifferent
Male
Female
Gonad
Testis
Ovary
Appendix testis
Fallopian tubes
Prostatic utricle
Uterus, upper vagina
Mesonephric tubules
Efferent ducts,
Paradidymis
Epoophoron,
Paroöphoron
Mesonephric duct
(Wolffian duct)
Rete testis
Rete ovarii
Mesonephric duct
Epididymis
Gartner's duct
Mesonephric duct
Vas deferens
Mesonephric duct
Seminal vesicle
Urogenital sinus
Prostate
Urogenital sinus
Bladder, urethra
Paramesonephric
duct
(Mullerian duct)
Paramesonephric
duct
Skene's glands
Bladder, urethra,
Urogenital sinus
Cowper's or
Bulbourethral gland
Bartholin's gland
Labioscrotal folds
Scrotum
Labia majora
Urogenital folds
Spongy urethra
Labia minora
Genital tubercle
Penis
Clitoris
Genital tubercle
Bulb of penis
Vestibular bulbs
Genital tubercle
Glans penis
Clitoral glans
Genital tubercle
Crus of penis
Clitoral crura
Prepuce
Foreskin
Clitoral hood
Peritoneum
Processus vaginalis
Canal of Nuck
Gubernaculum
Gubernaculum testis
Round ligament of
uterus

It is the space between
the deep membranous
layer of superficial fascia
and the perineal
membrane.
BOUNDARIES:
 Inferiorly: membranous
layer of superficial fascia
(Colle`s fascia).

Superiorly: perineal
membrane.

Laterally: ischiopubic
rami
1- Bulbs of vestibule:
on each side of
vaginal orifice.
• 2- Crura of clitoris.
• 3- Superficial perineal
muscles:
• A-Bulbospongiosus
muscle, surrounds
orifice of vagina
and covers
vestibular bulb.
•
• B- Ischiocavernosus
muscle, covers crus
of clitoris on each
side.
•
•
•
•
C- Superficial transverse perineal
muscles.
4- Greater vestibular glands: on each side
of vaginal orifice.
5- Perineal body
6- Perineal branch of pudendal nerve
suppling muscles & skin.
Bulbospongiosus
Ischiocavernosus

1- Root (bulb and crura) of
the penis and associated
muscles (ischiocavernosus
and bulbospongiosus).

2- Proximal (bulbous) part
of the spongy urethra.

3- Superficial transverse
perineal muscles.

4- Deep perineal branches
of the internal pudendal
vessels and pudendal
nerves.
Bulbospongiosus
Ischiocavernosus

It is a completely closed
space deep to the
perineal membrane.
BOUNDARIES:
 Inferiorly: Inferior fascia
of the urogenital
diaphragm (Perineal
membrane)
 Superiorly: Superior
fascia of the urogenital
diaphragm
 Laterally: Inferior portion
of obturator internus
fascia
Contents of Deep Perineal Pouch in female
•
1- Part of urethra .
•
2- Part of vagina.
•
3- Sphincter urethrae
muscle, which is
pierced by urethra &
vagina.
•
4- Deep transverse
perineal muscles
•
5- Internal pudendal
vessels.
•
6- Dosal nerve of
clitoris.

1- membranous part of the urethra,

2- the sphincter urethrae,

3- the bulbourethral glands,

4- the deep transverse perineal muscles, the
internal pudendal vessels and their branches,
and

5- the dorsal nerves of the penis.
1- In the centre:
a- Membranous urethra in
male
b- urethra and vagina in
female

2- On both sides of the urethra:
a- ducts of bulbourethral glands
of male
b- artery to bulb

3- Anteriorly
a-Deep and dorsal arteries of
penis or clitoris
b- Dorsal nerve of penis or
clitoris
 4- Posteriorly:
Scrotal or labial vessels and
nerves

BOUNDARIES:
• Anteriorly: Transverse
line passing through
the 2 ischial
tuberosities.
•
Posteriorly : coccyx.
•
Laterally : ischial
tuberosity &
sacrotuberous lig.
overlapped by
gluteus maximus.
CONTENTS:
•
Lower part of Anal canal (upper part
lies in pelvis).
Ano-coccygeal body (or raphe) :
a fibrofatty mass that extends from
anus to tip of coccyx.
•
•
Ischiorectal fossa on each side.
• A fascial lined wedgeshaped space on each
side of the anal canal.
Boundaries:
• Base: Skin of the
perineum.
• Medial wall: Levator ani
& anal canal.
• Lateral wall: Obturator
internus, covered with
pelvic fascia.
• Contents:
• Dense fat.
• Pudendal nerve & internal pudendal
vessels within the pudendal canal
• Inferior rectal nerve & vessels crossing the
fossa to reach anal canal.
• Pudendal Canal:
• A fascial canal formed by obturator fascia,
located on the lateral wall of the
ischiorectal fossa,
• on the medial side of the ischial tuberosity.
• Contains pudendal nerve and internal
pudendal vessels
Anococcygeal Body
The anococcygeal
body is a complex
musculotendinous
structure situated
between the anterior
aspect of the
coccyx and the
posterior wall of the
anorectal canal
 Receives insertion of
fibers of levator ani
muscle

Thank You
&
Good Luck