Cells at work is an anime which takes place inside a human body. The cells here become characters that perform functions inside the
body of humans. The characters are anthropomorphic cells who have a role to play in maintaining a human body. 
             The protagonists are Hakkekkyuu U-1 146, who is a creepy looking White Blood Cell and Sekkekkyuu AE3803, a rookie Red Blood Cell. They live alongside 37 trillion cells inside the body.The anime series offers a rich balance between entertainment and education.