Kagune

The Kagune is the ghoul's predatory Organ. It is a dense structure formed from activated RC Cells. Kagune are generally unique between every ghoul,  but there is a strong genetic factor: usually a child's kagune will look and function similar to one of their parent's. 

Kagune emerge from kakuhou sacks. The location of the sack will generally inform the type of kagune that is manifested. All of the different types of kagune