Vena Cavava Inferior

The inferior vena cava is an important part of the human venous system. It is one of the longest veins in the body, connecting the right atrium with the left renal vein and collecting blood from the abdominal organs, lower extremities and skin.

Anatomically and functionally, this vein can be divided into three sections: small, medium and large.

The small section of the Vena cava inferior is located on the posterior wall of the vagina of the rectus abdominis muscle. It passes through the posterior sacral fissure to the parietal branch, passing under the iliopsoas fascia, then ascends through the lateral pelvic canals and drains into the superior mesenteric vein.

The middle section is located in the small pelvis and the posterior part of the peritoneal cavity, spreading along the lateral wall of the small pelvis. It ends in front of the pectineal line near the entrance to the small pelvis, where it passes into the large section of the vena cava.

The large section is located in the large pelvis, here it is widest and curved, ending in a straight segment towards the midline. Passing through the uterosacral ligament allows it to descend to the bottom of the wide convex arch of the uterus along the posterior surface of the anterior and lateral surfaces of the bodies of the fallopian tubes and ovaries under the ligaments of the latter (the gates of the pelvic tissue).

An important point in the anatomy of this vein is its ability to drain blood from the lower part of the body, including the legs and abdomen. This is due to the fact that the inferior vena cava is responsible for the distribution of blood in the body as a whole, and also ensures the maintenance of correct pressure in the circulatory system. Moreover, she also plays