Bionum

Bionum is the compressed carbon-like, protodermis-based substance that serves as the average BIONICLE character's equivalent of flesh and bone. It is mainly either concealed within or grafted onto the character/creature in question's mechanical parts, and it explains how they are considered bio-mechanical, yet without skin, blood, or regular internal organs like humans or animals in the real world.

Examples of beings made of Bionum

 * Matoran
 * Toa
 * Turaga
 * Rahi
 * Genjuu
 * Glatorian
 * Agori
 * Makuta
 * Most other sapient species throughout Spherus Magna