Moyashimon, Hataraku Saibou (TV) Recommendations
So you wanna watch anime and learn biology at the same time? Welcome. While in Hataraku Saibou we have actual cells living and working inside the human body, in Moyashimon we have a protagonist who can see bacteria. Although the settings aren't the same, both feature biology and microorganisms as important/main characters in the series. And, yes, you will feel attached to them.
Both are fun and educational shows about microbiology and how it influences daily life.
Both talk about different kinds of cells that are hard to pronounce if you're no expert in science. Both are comedies and educational..