Each half of the pelvic girdle is made of a coxal bone, which is formed by the fusion of the ilium, ischium, and pubis. At the point of fusion of these three bones is a cavity that articulates with the thigh bone. Identify the name of this cavity and the specific type of joint it forms with the thigh bone.

Step-by-step solution

Each coxal bone of the pelvic girdle is formed by the fusion of three bones: ilium, ischium, and pubis. At the point of fusion of these bones is a cavity called the acetabulum, to which the head of the thigh bone (femur) articulates. The joint between the femur and the acetabulum of the pelvic girdle is a ball and socket joint, which is a type of synovial joint allowing considerable movement in multiple directions. The glenoid cavity is found in the pectoral girdle (articulating with the humerus), making the first