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Thread: FALLOPIAN TUBE (Uterine tube = Oviduct) Embryology - Anatomy - Histology

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    Default FALLOPIAN TUBE (Uterine tube = Oviduct) Embryology - Anatomy - Histology

    FALLOPIAN TUBE

    (Uterine tube = Oviduct)

    Embryological development
    It arises from the upper part of Mullerian duct.

    Description
    Site:
    Lies in the free upper part of broad ligament.
    Extends outwards & backwards from the uterine
    cornu to open into the peritoneal cavity.
    Size: 10 cm length.
    Shape: hollow cylinder.
    Parts (4 parts):
    1. Interstitial part (intramural part)
    • Inside the wall of the uterus.
    • Dimensions: 1 cm length × 1 mm diameter.
    • Differs from other parts of tube in that:
    i. It has no peritoneal coverings.
    ii. It has no outer longitudinal muscle layer.
    2. Isthmus
    • Immediate lateral to the uterus.
    • Dimensions: 2 cm length × 2 mm diameter.
    • It is the narrowest part.
    3. Ampulla
    • Expanded part following the isthmus.
    • Dimensions: 5 cm length × 5 mm diameter.
    • It the widest part.
    4. Infundibulum
    • Funnel shaped.
    • Dimensions: 2 cm length.
    • Has finger like processes called fimbriae, the longest one is attached to the ovary
    called (fimbria ovarica).
    • Opening pierces the upper layer of broad ligament to open into the general
    peritoneal cavity.

    FALLOPIAN TUBE (Uterine tube Oviduct) attachment.php?attachmentid=3304&d=1507730570

    Relations:
    • Above: loops of small intestine.
    • Below: both leaflets of broad ligament & its contents.
    • Medial: uterine cornu communicating with uterine cavity.
    • Lateral: lateral pelvic wall.
    • Posterior: ovaries.

    Structure (Histology):
    1) Lumen: lined by simple columnar epithelium partially secretory partially ciliated
    that forms mucosal folds (endosalpinx).
    2) Wall: outer longitudinal & inner circular muscle.
    3) Coat: reflection of broad ligament (absent inferiorly).

    Blood supply
    A. Arterial: uterine artery (of internal iliac) & ovarian artery (of aorta).
    B. Venous: *Right ovarian vein IVC.
    *Left ovarian vein left renal vein IVC.

    Nerve supply

    * Sympathetic : T11, T12
    * Parasympathetic: S2, 3, 4

    Lymph drainage
    ♦ To para-aortic L.Ns directly through ovarian lymphatics.

    Applied anatomy (Surgical importance):
    1) Fallopian tube has double blood supply, so gangrene never occurs.
    2) Provide site of fertilization & the fertilized ovum remains 4 days within it.
    3) In tubal ectopic:
     If in the ampulla: Delayed disturbance (wide part).
     If in the isthmus: Early disturbance (narrow part).
    4) In ART for infertility treatment, ZIFT and GIFT.
    5) Tubal ligation is a method of contraception.

    Congenital anomalies:
    - Aplasia: *complete absence of tubes.
    *associated with absence of the uterus & upper ¾ of vagina.
    - Hypoplasia (long thin tortuous tube, more liable to ectopic pregnancy & infertility).
    - Shape: accessory ostium & tubal diverticulum predispose to ectopic pregnancy.

    Functions of the tube:
    1. Pick up of ovum from the ovary.
    2. Site of sperm capacitation by tubal secretions.
    3. Site of fertilization.
    4. Transport of the zygote towards the uterine cavity by peristaltic & ciliary movements.

    Anatomy of the fallopian tube.




    Lecture on Anatomy of FALLOPIAN TUBES/UTERINE TUBES













    Attached Images  
    Last edited by Dr.Galal Baligh; 10-27-2017 at 02:00 PM.

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