Note 51 — THE MUSCULAR SYSTEM

It must be admitted that the term “ring” is rather misleading as applied to the abdominal opening of the canal, since normally it is a mere dilatable slit. The ring-like constriction which exists here in the male is constituted by the peritoneum, which descends into the canal to form the tunica vaginalis. This peritoneal ring is termed the vaginal ring (Annulus vaginalis), and must not be confused with the subperitoneal ring, i. e., the internal inguinal ring.