placental septum

A placental septum is a column of decidual connective tissue that extends from the basal plate into the intervillous space, partially subdividing placental territory.

Placental septa originate from the basal plate and project upward into the intervillous space, forming partial partitions that create discrete placental lobules.

The septa provide structural organization to the placenta and define maternal blood supply territories, while not completely separating fetal villous blood circulations.

The septa originate from the basal plate and are surrounded by intervillous space containing maternal blood and fetal villi.

Septal abnormalities can lead to abnormal placental development patterns and are associated with conditions like placental abruption.