Uterine Tubes

Uterine Tubes

The uterine tubesAlso called fallopian tubes, they transport the oocyte to the uterus. are also known as oviducts or fallopian tubes. They are paired structures. These tubes extend from the uterusThe muscular organ where a fertilized egg implants and develops. towards the ovariesThe female gonads that produce eggs and hormones.. These tubes serve as the conduit through which the ovulated oocyte (egg) travels from the ovary to the uterus. The primary function of the uterine tubes is to provide a pathway for the ovulated oocyte. It allows the oocyte to move towards the uterus. This is where fertilization may occur.

Uterine Tube Anatomy

The uterine tubes are made up of several segmentsThe subdivisions of lung lobes, supplied by tertiary bronchi., including the infundibulumThe stalk connecting the hypothalamus to the pituitary gland., ampulla, and isthmusA narrow portion of the uterine tube connecting to the uterus.. The infundibulum, the funnel-shaped opening near the ovary, has fimbriaeFinger-like projections of the uterine tube that help capture the ovulated oocyte. that help capture the egg after ovulationThe release of a mature oocyte from the ovary..  Actually, in ovulation the ovary spits out the ovulated ovumA mature egg cell and it may not exactly go into the uterine tube.  The fimbriae, pictured here, are like little fingers that wave the ovum back into the tube.  If sperm are present in the uterine tube during ovulation, fertilization generally occurs in the ampulla. This section A cut or slice of the body or an organ for study. is the widest part of the tube. After fertilization, the zygote moves through the tube into the uterus for implantation. The ciliaHair-like projections on the surface of some cells that move fluids or particles. and smooth muscle of the uterine tubes help move the oocyte. They also assist in moving the fertilized egg along this path.

Uterine Tube Wall

The uterine tube, also known as the oviduct or fallopian tube, has a highly folded epithelial lining. This lining is composed of simple columnar epithelium. This epithelium contains both ciliated and non-ciliated cellsThe basic structural and functional units of life.. The ciliated cells play a key role in moving the ovulated oocyte toward the uterus. The folds in the epithelium increase the surface area. This provides a conducive environment for the movementA fundamental property of life involving motion of the body or its parts. and interaction of the oocyte and sperm.

Beneath the epithelial layer, the uterine tube consists of two layers of smooth muscle. These layers facilitate peristalsis—wave-like contractions. These contractions propel the oocyte or fertilized egg along the tube. These muscular contractions work with the ciliary action. Together, they ensure the oocyte moves smoothly from the ovary towards the uterus. This movement allows for potential fertilization and implantation.

Uterine Tube Issues

An ectopic pregnancy occurs when a fertilized egg implants outside of the uterus. It typically begins to develop in one of the uterine tubes (fallopian tubes). Issues with the tube can allow this to happen. These issues may include a blockage or damage. They prevent the egg from reaching the uterus. As the embryo grows, it can cause the tube to rupture. This can lead to internal bleeding, severe pain, and potentially life-threatening complications for the mother. Ectopic pregnancies cannot be carried to term. Doctors typically treat them with medication or surgery to remove the embryo and repair any damage.

Tubal ligation is a surgical procedure. A woman’s fallopian tubes are permanently blocked or sealed. This prevents eggs from traveling from the ovaries to the uterus. It also stops sperm from reaching the eggs. This procedure is commonly performed as a form of permanent contraception. Tubal ligation can be done through various methods, including cutting, tying, or using clips or rings to block the tubes. While it is highly effective at preventing pregnancy, it is considered permanent. Reversal is often complicated. Therefore, it is typically chosen by women who do not wish to have children in the future.