Versatile anatomical “building block” (4,4)

I believe the answer is:

stem cell

(Other definitions for stem cell that I've seen before include "Undifferentiated functional unit in an organism" , "Versatile building block of life" , "genetic unit" , "Undifferentiated unit of life" , "body-builder" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.