Seimei no Kagaku: Micro Patrol
English name: Once Upon a Time... Life
Genres: Adventure
Type: OVA, Episodes: 26
Aired: 1986
Studio: Eiken
Source: Unknown
Rating: G - All Ages
Synopsis:
The series "Once Upon a Time... Life" teaches about the human body and about the different systems in it with the same characters from the other "Once Upon a Time" seasons. "The good Characters" represent the body's defense mechanisms, whereas "the bad Characters" represent the viruses and bacteria that threaten to attack the human body.

(Source: Wikipedia)