Yes, the coxal bones, also known as hip bones or pelvic bones, are part of the appendicular skeleton. The appendicular skeleton consists of the bones of the limbs and the bones that anchor them to the axial skeleton, which includes the spine and skull.
The coxal bones form the pelvic girdle, which supports the weight of the upper body when sitting and standing, and allows for movement of the lower limbs. Each coxal bone is made up of three fused bones: the ilium, ischium, and pubis. This structure is crucial for various bodily functions, such as locomotion and protecting internal organs in the pelvic area.