anatomy of female genital tract

1. ANATOMY OF
FEMALE GENITAL
TRACT
By
AYMAN SHEHATA
Assist. Lect. OB/GYN
TANTA UNIVERSITY

2. • External genitalia
• Internal genitalia
• Accessory reproductive organs

3. Female external genitalia

4. Mons
veneris
Labia
majora
• Post commisure
Labia
minora
• prepuce
• Frenulum
• Fourchette
• Fossa navicularis
clitoris
• Glans
• Body
• 2 crura
vestibule
• 6 openings
• bartholin’s abscess
• Hymen
External
genitalia
(vulva,
pudendum)

6. External Genital Organs(vulva)
• Mons pubis
• Labia majora
• Labia minora
• Clitoris
• Vestibule of the vagina
External urethral
orifice
Vestibule glands
paraurethral glands
(Skene’s glands)
Bartholin's gland
vagina opening
hymen
External genitalia of adult female (parous)

7. MONS PUBIS
 The triangular mound of fatty tissue that
covers the pubic bone
 It protects the pubic symphysis
 During adolescence sex hormones trigger
the growth of pubic hair on the mons
pubis
 Hair varies in coarseness curliness,
amount, color and thickness

8. LABIA MAJORA
 Referred to as the outer lips
 They have a darker pigmentation
 The Labia Majora:
 Protect the introitus and urethral openings
 Are covered with hair and sebaceous
glands
 Tend to be smooth, moist, and hairless
 Become flaccid with age and after
childbirth

9. LABIA MINORA
 Referred to as the “inner lips”
 Made up of erectile, connective tissue that
darkens and swells during sexual arousal
 Located inside the labia majora
 They are more sensitive and responsive to
touch than the labia majora
 The labia minora tightens during
intercourse

10. CLITORIS
• Highly sensitive organ composed of
nerves, blood vessels, and erectile tissue
• Located under the prepuce
• It is made up of a shaft and a glans
• Becomes engorged with blood during
sexual stimulation
• Key to sexual pleasure for most women
• Urethral opening is located directly
below clitoris
Clitoris

11. VAGINAL OPENING
INTROITUS
 Opening may be covered by a thin
sheath called the hymen
 Using the presence of an intact hymen
for determining virginity is erroneous
 Some women are born without hymens
 The hymen can be perforated by many
different events
UNIT 3: FEMALE
REPRODUCTIVE SYSTEM 11

16. • Blood supply
– Arteries
• Br. of internal pudendal artery
– Labial A.,
– Transverse perineal A.,
– A to vestibular bulb,
– deep & dorsal arteries to clitoris
• Br. of Femoral A
– Superficial & deep external pudendal A
– Veins
• Internal pudendal vein
• Vesical/ vaginal venous plexuses
• Long saphenous vein

17. • Nerve supply
– Ant-sup part
• Ilio inguinal & genital br. of genitofemoral N (L1,L2)
– Post-inf part
• Pudendal br. of post.cut. N of thigh (S123)
– In between
• Labial & perineal br.of Pudendal N (S234)
• Lymphatics
– Superf. Inguinal nodes
– Gland of Cloquet
– Ext. & Int. Iliac nodes

18. PERINEUM
• The muscle and tissue located between the
vaginal opening and anal canal
• It supports and surrounds the lower parts of
the urinary and digestive tracts
• The perinium contains an abundance of nerve
endings that make it sensitive to touch
• An episiotomy is an incision of the perinium
used during childbirth for widening the vaginal
opening
UNIT 3: FEMALE REPRODUCTIVE SYSTEM 18

19. Vagina
Uterus
Fallopian
tubes
ovaries
Internal
genital
organs

21. Vagina
• Fibromuscular membranous sheath
• Excretory channel
• Organ of copulation
• Birth canal of parturition
• 45° horizontal
• 2.5cm diameter
• distensibility

22. VAGINA
• The vagina connects the cervix to the external genitals
• It is located between the bladder and rectum
Functions :
• As a passageway for the menstrual flow
• For uterine secretions to pass down through the introitus
• As the birth canal during labor
• With the help of two Bartholin’s glands becomes lubricated
during SI

23. • Walls
– Ant : 7.5 cm
– Post : 9cm
– 2 lateral walls
• Fornices :
– Ant : shallow
– 2 lateral
– Post : deep

24. Normal vaginal mucosa

28. Pelvic floor superior view

29. Pelvic floor inferior view

30. Pelvic floor side view

31. levator ani muscle is largest and
strongest muscle in the pelvis
Ischiococcygeus
Iliococcygeus
Pubococcygeus
(Master sphincter)
(weight bearing)
(weight bearing)

32. Urogenital diaphragm
• Braces the vagina and
urethra (PUL)
• Provides the stage for
sexual quartet
•Stabilizes the perineal
body

33. The fetal head can damage
the pelvic floor

34. Sexual quartet
1-Clitoris
(Krause corpuscles)
2-Vestibular bulb
(Erectile tissue)
3-Bartholin gland
(Alkaline mucous)
4-Vagina
(Copulatory canal)

35. • Structure
– mucous coat
– Submucous layer of loose areolar vascular
tissues
– Muscular layer
– Fibrous coat (from endopelvic fascia)
:highly vascular
• Vaginal secretion
– Doderlein’s bacilli : lactic acid from
glycogen

36. • Blood Supply
– Arteries
• Cervicovaginal br. Of uterine A
• Vaginal A
• Middle rectal A
• Internal pudendal
• Anastomose---form 2 azygos arteries
– Veins drain into:
• Internal iliac V
• Internal pudendal V
• Lymphatics drain into
• Upper 1/3rd : internal iliac nodes
• Middle 1/3rd: external iliac nodes
• Lower 1/3rd (below hymen) : superficial inguinal gp.
• Nerve supply
• Parasympathetic : S234
• Sympathetic: hypogastric plexus
• Lower end : pudendal N (sensory )

37. Uterus
• Hollow, pyriform muscular organ
• Position: anteversion & anteflexion
uterus dextrorotated
• Measurements
– 7.5cm long
– 5cm wide
– 3cm thick
– Weight : 50-80gm

38. Parts of uterus

40. • Structure
– Perimetrium : serous coat
– Myometrium: thick bundles of sm. M
• During pregnancy:
– Outer long.
– Middle interlacing
– Inner circular
– Endometrium
• Surface epithelium
• Lamina propria
– Stromal cells
– Endometrial glands
– Vessels & nerves
• Decidua in pregnancy
• Secretion: scanty & watery

41. • Relation
–Anterior
• Above int.os : uterovesical pouch
• Below int.os: separated from UB by loose areolar
tissue
–Posterior
• Pouch of Douglas with coils on intestine
–Lateral
• Broad ligament
• Mackenrodt’s ligament
• Uterine A & ureter

42. • Ligaments of uterus
– Uterosacral ligament
– Transverse cervical/ Mackenrodt’s lig
– Pubovesicocervical lig
– Round ligament
– Broad ligament
• Mesovarium
• Mesosalpinx
• mesometrium
• Suspensory lig of ovary/ infundibulopelvic ligament

43. Water flows under a bridge
ureter
Uterine
artery

44. • Blood supply
– Arteries:
• Uterine A
• Ovarian & Vaginal As.
– Veins drain into
• Internal iliac veins
• Lymphatics
• Nerves
– Sympathetic
• Motor : T5 & T6
• Sensory : T10 – L1
– Parasympathetic
• Pelvic N ( S2,3,4) : both motor &
sensory : ends in ganglia of
Frankenhauser

45. 1
2
2
33
4
4
5 5
6
Figure: internal organs in female pelvis. 1. uterus, 2. ovaries, 3. fallopian
tubes, 4. round ligaments, 5. utersacral ligaments, 6. rectouterine pouch
(pouch of Douglas) , 7.broad ligaments.
7

47. Arterial system
1. Ovarian artery: the chief source
of the blood for ovaries.
2. Uterine artery:
corpus branch
cervical-vaginal branch
3. Vaginal artery: main source of
the blood for the middle part
of vagina
4. Internal pudendal artery: supply
for superficial perineum, labia
majora, labia minora, lower
part of the vagina, clitoris
Blood supply for female genitalia

48. Fallopian tube
(uterine tube, oviduct)
• 10-14 cm
• Lies within the superior
border of broad ligament
• 2 openings
– Medially into cornua
– Laterally into abdominal cavity

49. Parts of fallopian tube

51. Structure : -3 layers

52. • Blood Supply
– Arteries
• Uterine A
• Ovarian A
– Veins
• Through pampiniforn plexus into ovarian veins
• Lymphatics
• Para-aortic nodes
• Nerve supply
– Uterine & ovarian nerves

53. The Ovary
• Paired, situated on either side of uterus
• Close to lateral pelvic wall
• In ovarian fossa of Waldeyer
• Size: 4*3*2 cm
• Only intra-abdominal structure not covered by
peritoneum
• Medial pole: attached to uterine cornua by
ovarian ligament
• Laterally to the pelvic wall by infundibulopelvic
ligament
• Fimbrial end of oviduct close to ovary & attached
to it via fimbria ovarica

55. • Structure : 2 parts
• Lined single layer of germinal epithelium of
Waldeyer (cuboidal epi.)
• Tunica albuginea : stromal cells thickened
beneath germinal epithelium
• Contain primordial follicles
• Corpus albicans/ atretic follicles
Cortex
• Loose connective tissues, blood vessels,
nerves, muscles
• Hilus cells : homologous to interstitial cells of
testes
Medulla

57. • Blood Supply
– Arterial : Ovarian A
– Veins :
• Through pampiniform plexus ovarian V.
Lt. Renal Vein IVC
• Lymphatics
• Para-aortic nodes
• Nerve supply
• Sympathetic supply from T10 along ovarian A.

58. Pelvic vessels

59. Pelvic vessels

60. • Lymphatic drainage:
– External genital organ lymph group:
1. superficial inguinal lymph nodes.
2. deep inguinal lymph nodes
– Pelvic lymph group:
1. iliac lymph group.
2. presacral lymph group.
3. lumbar lymph group.

61. Lymphatic drainage

62. The nerve of external genitalia
• Pudendal nerve
– Obstetric local anesthesia
• Divided into 3 branches beside tuberosity
– Inferior hemorrhoid nerve
– Dorsal nerve
– Perineal nerve

63. The nerve of internal genitalia
• Sympathetic and parasympathetic nerves from
lumbar and sacral spinal cord
• Sympathetic nerve are derived from Plexus
– Sacral plexus
– Ovarian plexus

64. Pelvic innervation
Frankenhauser’s plexus
Pudendal nerve
Hypogastric nerve (s)
Superior hypogastric plexus
Inferior mesentric plexus
Celiac plexus
Inferior hypogastric plexus
PSN
LUNA

66. BREASTS
• Organs of sexual arousal
• Contain mammary glands
• Consist of connective tissue
that serves as support
• Each breast contain 15-25
clusters called lobes
• Each lobule is connected by
ducts that open into the
nipples
• The nipples are made up of
erectile tissue
• The pigmented around the
nipples are called the areola
• Breast size is determined
primarily by heredity
• Size also depends on the
existing fat and glandular
tissue
• Breasts may exhibit cyclical
changes, including
increased swelling and
tenderness prior to
menstruation
• Benign breast changes refer
to fibrocystic disease
• Lumps or masses that are
noncancerous

67. UNIT 3: FEMALE REPRODUCTIVE SYSTEM 67