The perineal region is that part of the trunk below the pelvic diaphragm. It is diamond shaped and has the same boundaries as the pelvic outlet. It is divided into an anterior, urogenital triangle and a posterior, anal triangle.
Definition for &QUOT;Quasar&QUOT; an incredibly distant, and thus old, celestial objectâ¦ View More
The structure is a large quasar group (LQG), a collection of extremely luminous galactic nuclei powered by supermassive central black holes. This particular group is so large that it challenges modern cosmological theory, researchers said.