Humanoids whose bodies lack distinct internal organs, letting them survive wounds fatal to others, as shown by the scientist Jo'Bril.
The Takarans are a humanoid species with a highly unusual physiology. Their bodies lack distinct internal organs, which makes them remarkably hard to kill and allows them to survive injuries that would be fatal to most humanoids, and even to appear dead.
In Suspicions, the Takaran scientist Jo'Bril took part in a test of the Ferengi scientist Reyga's metaphasic shield. Jo'Bril faked his own death, murdered Reyga and planned to steal the technology for himself. Beverly Crusher, risking her career by continuing to investigate, exposed him and stopped him during a confrontation aboard a shuttle.