Origin
Human body
Red Blood Cell AE3803 A ditzy red blood cell who has just started her job, delivering oxygen and carbon dioxide all over the body. She meets Neutrophil when he saves her from an attacking pneumococcus germ. She is clumsy and gets lost often, but determined to perform to the best of her ability. Her age is ~7-10 days Her weight is ~0.000000000001kg Her height is 0.00062cm Her waist is 0.0008cm Her hip is 0.0002cm

Cells at Work
This is a story about you. A tale about the inside of your body... According to a new study, the human body consists of approximately 37 trillion cells. These cells are hard at work every day within a world that is your body. From the oxygen-carrying red blood cells to the bacteria-fighting white blood cells, get to know the unsung heroes and the drama that unfolds inside of you! It's the oddly relatable and interesting story that is the life of cells! (Source: Aniplex USA)

Cells at Work 2nd Season
The cells of the human body never rest for too long; there's always something new to do and learn every day. At least, that's what Hakkekkyuu U-1146 feels as he rushes to and fro, searching for any pathogens that could cause harm to the body. Despite his dangerous line of work, it's all worth it to protect the happy smiles of Sekkekkyuu AE3803, the platelet crew, his fellow neutrophils, and the other cells he meets along the way. In his latest pathogen-hunting adventures, Hakkekkyuu U-1146 discovers how important cells can sometimes make mistakes, and that not all bacteria are actually bad. Everybody has their bad days, but everything eventually works out when their comrades have their backs. In the end, it's just another normal day for these hardworking cells!