As with the anal triangle, the roof or ceiling of the urogenital triangle is the levator ani muscle.
Unlike the anal triangle, the urogenital triangle contains a strong fibromuscular support platform, the perineal membrane and deep perineal pouch (see pp. 449–451), which is attached to the pubic arch.
Anterior extensions of the ischio-anal fossae occur between the deep perineal pouch and the levator ani muscle on each side.