Page "Space Marines (Warhammer 40,000)" Paragraph 9

The 19 implanted organs are complicated, and because several of them only function in the presence of other implants, the removal, mutation, or failure of one organ can affect the functionality of others.

Because of this, and the fact that each Chapter's gene-seed belongs to that Chapter alone, different Chapters display different characteristics and use different sets of implants and methods of implantation.

For example, " Blood of Sanguinius " is administered to the Blood Angels only ; and the Space Wolves are the only Space Marines with Canis Helix implants.