Parts | Uterus

Parts

Niharika Nixit MD Ashley Davidoff MD

The uterus is divided in to two parts by a constriction called isthmus midway between apex and base. The portion above the isthmus is called as corpus or body of uterus and below the isthmus is called the cervix. The isthmus corresponds to internal orifice of uterus. The portion of body above opening of fallopian tubes is called as fundus.

Corpus Uteri ( Body ) gradually narrows from fundus to isthmus

Vesical or anterior surface is flattened and covererd by peritoneum which reflected on to the bladder to for, vesicouterine space.

Intestinal or posterior surface Is convex transcversely and is covered by peritoneumdown to the cervix and vagina it is in relation with sigmoid colon separated by loops of intestine this is called a pouch of Douglas; Pelvic collections ususlly collect in this space and can be drained vaginally.

Lateral margins are usually convex . At the upper and of each, uterine tubes pierce the uterine wall, below and infront of it is the attachment of round ligament; while posterior to its the attachment of ligament of ovary. The peritoneum fold relected from uterine wall invests these structure and is know as broad ligament

Supports of uterus: Uterus remains in its pelvic position by virtue of its positions and various ligaments that keep it in position. These supports can lose strength with multiple vaginal childbirths, menopause and age and cause utero-vaginal position.

The “T” shaped Uterus and its Component Parts

The diagram reflects the “T” shaped structure of the uterus as well as the component parts including the fundus (dark pink) the body (light purple), and cervix (royal blue). The Fallopian tubes (teal) at the upstream end, and the vagina at the downstream end (purple) complete the tract of the genital tract .

The Tract Within the Component Structures

The diagram reflects the “T” shaped structure of the uterus, the component parts, and the tract (light pink) starting from the vagina (purple and extending through the uterus and Fallopian tubes (teal). The parts that the tract traverses includes the vagina at the downstream end (purple), cervix (royal blue), lower uterine segment (light blue), the body (light purple), the fundus (dark pink) and finally the Fallopian tubes (teal) at the upstream end.

Creating Form around the “T”

The diagram reflects the “T” shaped structure of the uterus, the component parts, and the tract (light pink) starting from the vagina (purple and extending through the uterus and Fallopian tubes (teal). The form of the structures surrounding the tract have been expanded to their relative dimensions and shapes The parts that the tract traverses includes the vagina at the downstream end (purple), cervix (royal blue), lower uterine segment (light blue), the body (light purple), the fundus (dark pink) and finally the Fallopian tubes (teal) at the upstream end. .

Shaping the “T” to Realistic Form

The diagram advances the “T” shaped structure of the uterus and the genital tract. The form of the structures and the tract have been expanded to their relative dimensions and shapes The parts that the tract traverses includes the vagina at the downstream end which now is a significantly expanded part of the tract (pink), cervix (royal blue), lower uterine segment (light blue), the body (lighter blue), the fundus (dark pink) and finally the Fallopian tubes (teal) at the upstream end.

In the Sagittal Plane

“L” Shpaed Structure in the Sagittal

The diagram represents a sagittal view of the uterus reflecting an ‘L” shaped structure of the uterus and vagina The parts that the “L” represents include the the fundus (dark pink), the body (lighter blue), lower uterine segment (light blue), cervix (royal blue), and the vagina (purple) at the downstream end.

The “L”Shaped Uterus and Vagina with the Internal Tract

The diagram represents a sagittal view of the uterus reflecting an ‘L” shaped structure of the uterus vagina, and the internal cavity. The parts that the tract traverses includes the vagina at the downstream end which now is a significantly (pink), cervix (royal blue), lower uterine segment (light blue), the body (lighter blue), and the fundus (dark pink).

The “L” Shaped Uterus

The sagittaly reconstructed CT shows an anteverted uterus buoyed and cushioned by partly filled bladder (yellow) In this sagittal view of the uterus an ‘L” shaped structure of the uterus vagina, and the internal cavity is diagrammed in by the pink vectors of the tract.

The Flow of the Fallopian Tubes

46701b03.49k.8s uterus fallopian tubes cervix ovaries broad ligament normal anatomy vagina gravid vertex presentation brain placenta foot rawMRI T2 weighted Courtesy Ashley Davidoff MD Davidoff art copyright 2009 all rights reserved

Fallopian Tubes – Connection to Life

46376b01b01b05 pelvis uterus Fallopian tubes fimbrae uterus uterine cavity cervix vagina fornix hysterosalpingogram Davidoff MD