What are HeLa cells and why are they important?

Hela cells are the most important and most used immortal human cell lines.

They are used to test the effects of things such as cosmetics, toxins, and radiation on human cells, and have been useful in studying human diseases such as cancer and gene mapping.

they're important because they dont die and reproduce quickly

Explanation:

the hela cells are the line of cells taken from cervical cancer of an unspecting african ameircan women called the henrietta lacks in 1951.