Final answer:
Henrietta Lacks had nine siblings. She was the ninth child in her family, and her family history is significant in understanding her life and the role her HeLa cells have played in medical history.
Step-by-step explanation:
The question is about how many siblings Henrietta Lacks, the source of the famous HeLa cell line, had growing up. Henrietta Lacks had a total of nine siblings.
Henrietta was the ninth child of Johnny and Eliza Lacks, a family from Virginia. She grew up in a large family with many siblings, which was not uncommon in rural parts of the United States at the time. Knowing about her family background is important when studying her life and the impact her HeLa cells have had on medicine.