Cells

Cells are the basic structural, functional, and biological units of all living organisms. Together they form a multicellular organism, thus they are known as the "building blocks of life". However cells are anthropomorphic in Cells at Work! and have their own story in the List of Cells

There are roughly 37.2 trillion cells in a human body.

Immature Cells
A Progenitor Cell is a newly born cell that has not differentiate into a specific cell type, similar to a baby.

Trivia

 * Due to how this is an artistic representation, some things are bound to be inaccurate.
 * See: red blood cells carrying more than just oxygen and carbon dioxide as part of their job.
 * Neutrophils and Macrophages using weapons instead of phagocytosis to kill bacteria