In Freitas' proposal, each<unk>  could store and transport 236 times more oxygen than a natural red blood cell, and could release it in a more controlled manner. Freitas has also proposed "microbivore" robots that would attack pathogens in the manner of white blood cells.
Respirocyte
Centrocyte
Corneocyte
Koilocyte
Dendritic cell
Podocyte
Prolymphocyte
Mast cell