Respirocyte pumping station layout. Each station occupies one dodecant (30°) of sphere surface; each respirocyte has 12 pumping stations, any one of which, acting alone, can load or unload a tank in 10 seconds.
Robert A. Freitas Jr., “Respirocytes: High Performance Artificial Nanotechnology Red Blood Cells,” NanoTechnology Magazine 2 (October 1996): 1, 8-13 (8).