Q.A person slips from the staircase and breaks his ankle bone. Which bones are involved?

The pelvic (hip) girdle links the hind limb to the axial skeleton via two coxal (hip) bones, each fused from the ilium, ischium and pubis, meeting the sacrum posteriorly; their point of fusion forms the acetabulum, a socket for the femur's head. The two pubic bones meet at the pubic symphysis, and the pubis-ischium ring encloses the obturator foramen.

The lower limb's bones are the femur (the body's longest bone, with a head/neck at an angle fitting the acetabulum, and distal condyles articulating with tibia/fibula), the patella (a sesamoid kneecap bone), the tibia (thick, weight-bearing, articulating with the femur above and the talus below) and fibula (slender, lateral to the tibia, joined to it by an interosseous membrane), the tarsals (7 ankle bones in three rows, including the calcaneum/heel bone and talus), the metatarsals (5 sole bones), and the phalanges (toe bones — three per toe except two in the big toe).