WARNING: CONTAINS POTENTIALLY DISTURBING VIDEO.<br/> STORY: Conjoined twins born in Brazil have two functioning brains and spines, but only one heart.<br/> Named Jesus and Emanuel - the newborn boys were rushed to a better equipped hospital in stable condition.<br/> Doctors are unsure whether operating to separate them - or remove one of their heads - will be possible because they share a single set of organs.<br/> (SOUNDBITE) (Portuguese) DOCTOR RESPONSIBLE FOR THE CONJOINED TWINS, NEILA DAHAS, SAYING:<br/> "What we know statistically is that the children who undergo surgery and survive are the children who have less organs in common."<br/> The rare condition occurs when one of two conjoined twins fails to fully develop in the womb.<br/> Katharine Jackson, Reuters.