Final answer:
Bone marrow extraction involves inserting a needle near the iliac crest of the pelvic bones. The procedure can be painful.
Step-by-step explanation:
In the context of bone marrow extraction, the procedure involves inserting a needle into the region near the iliac crest of the pelvic bones. This location is chosen because it is accessible and isolated from vital organs. It is important to note that the procedure can be painful for the patient.