[1] The falciform ligament is a broad and thin fold of peritoneum, its base being directed downward and backward and its apex upward and forward.

The falciform ligament stretches obliquely from the front to the back of the abdomen, with one surface in contact with the peritoneum behind the right rectus abdominis muscle and the diaphragm, and the other in contact with the left lobe of the liver.

The ligament stretches from the underside of the diaphragm to the posterior surface of the sheath of the right rectus abdominis muscle, as low down as the umbilicus; by its right margin it extends from the notch on the anterior margin of the liver, as far back as the posterior surface.

Its base or free edge contains, between its layers, the round ligament and the paraumbilical veins.

[2] This article incorporates text in the public domain from page 1192 of the 20th edition of Gray's Anatomy (1918)