Pelvic girdle: The ring of bones around the lower body that connects the axial skeleton to the lower limbs and supports organs like those of digestion and reproduction.
Pubic symphysis: A cartilaginous joint that sits between and joins the left and right superior rami of the pubic bones.
Ischium:One of three bones that make up each side of your pelvis and includes a prominent feature known as the ischial tuberosity, which bears weight when sitting