Uterine Tubes

UTERINE TUBES

Uterine tube is an even tube that is implanted on each side at the respective latero-superior angle of the Uterine Tubauterus, and protrudes laterally, representing the horizontal branches of the tube.

This tube is irregular in size and approximately 10 cm long.
It expands as it moves away from the womb, opening distally by a true fringed-edge funnel.

The fallopian tube is divided into 4 regions, which in the mid-lateral direction are: Uterine, Isthmus, Ampoule and Infundibulum.

UTERINE TUBE PORTIONS

THE Uterine Part It is the intramural portion, that is, it constitutes the segment of the tube that is located in the wall of the uterus.

At the beginning of this portion of the tube, we find a hole called the tube's uterine ostium, which establishes its communication with the uterine cavity.

THE Isthmus It is the least caliber portion near the uterus, while the ampoule is the dilation following the isthmus.

THE Light bulb It is considered the place where egg fertilization by sperm usually occurs.

The most distal portion of the tuba is the Infundibulum, which can be compared to a funnel whose mouth has a very uneven rim, having the appearance of fringes.

These fringes are named tuba fimbriae, one of which stands out for being longer, called ovarian fimbria.

The infundibulum opens freely in the peritoneum cavity through a foramen known as the uterine tube abdominal ostium.

The horizontal part would be represented by the isthmus and the vertical part by the ampoule and infundibulum.

Commonly the infundibulum fits over the ovary, and the fimbriae could be roughly compared to the fingers of one hand holding an orange over it.

Structurally, the fallopian tube consists of four concentric layers of tissues that are, from the periphery to the depth, the serous tunic, subserous mesh, muscular tunic and mucous tunic.

The muscular tunic, represented by smooth muscle fibers, allows peristaltic movements to the tube, assisting the migration of the egg towards the uterus.

The mucous membrane is formed by hair cells and has numerous longitudinal parallel folds, called tubal folds.

The Uterine Tube has two Functions:

 Carry the ovary egg to the uterus;

 Place where egg fertilization by sperm occurs.

UTERINE TUBE DIVISIONS
 UTERINE TUBE DIVISIONS
Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

 

Structures of
Female Genital System
Ovaries
Uterus
Vagina
External Organs

 

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