Definition: A pessulus is a type of organ that is found in the uterus, specifically within the cervix. It is a structure made up of two overlapping membranes, one for the amniotic fluid and the other for the uterine lining. The pessus acts as a barrier to protect the cervix from infection and allows contractions to occur more easily. In addition to its role in preventing infection, the pessus also plays an important role in the development of the uterus.
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