Answer:
The correct answer is - Greater sciatic notch
Explanation:
The greater sciatic notch is a notch in one of the pelvic bones n the human called the ilium. It is located between the posterior inferior iliac spine, and the auricular surface or ischial spine. It is the passageway through the pelvis into the thigh and posterior side.
where its free (unbound) concentration is lower
I'm pretty sure it's the white blood cells, because they contain antibodies to neutralise the pathogen :) plz mark brainliest
