It is lined by peritoneum and at its base is the rectoprostatic fascia (Denonvillier's fascia). When a man is upright or supine, it is the lowest part of his peritoneal cavity.
Encircled by peritoneum and situated at its base is the rectoprostatic fascia (Denonvillier's fascia). Regardless of whether a person stands or lies down, it forms the lowest part of their peritoneal cavity.