Omphalomesenteric vein

Omphalomesenteric Vein

The Omphalomesenteric Vein in a human embryo at end of fourth week (Gray's Anatomy)

The Omphalomesenteric Vein (also known as the Vitelline Vein or Yolk Sac Vein) is a blood vessel present during the embryonic development of vertebrates. It plays a crucial role in the formation of the Portal Vein system.

Structure

The Omphalomesenteric Vein is formed from the Yolk Sac in the developing embryo. It carries blood from the yolk sac to the Sinus Venosus, which eventually forms part of the heart. The vein is paired, with one on each side of the embryo, and these join to form a single vessel.

Development

During the development of the Digestive System, the Omphalomesenteric Vein undergoes significant changes. It forms the basis for the development of the portal vein system, which carries blood from the gastrointestinal tract and spleen to the liver. The vein also contributes to the formation of the Inferior Vena Cava and the Hepatic Veins.

Clinical Significance

Anomalies in the development of the Omphalomesenteric Vein can lead to various congenital conditions, such as Portal Vein Thrombosis and Abernethy Malformation. Understanding the development and function of this vein is crucial in diagnosing and treating these conditions.

See Also

• Embryology
• Yolk Sac
• Portal Vein
• Sinus Venosus