Answer
Bone marrow is divided into red marrow and yellow marrow. Red marrow produces red blood cells, white blood cells, and platelets, while yellow marrow stores fat. The axial skeleton forms the head, neck, and trunk, while the appendicular skeleton forms the arms, legs, and pelvic girdle. All 12 pairs of ribs attach to the thoracic vertebrae. The os coxae is made of the ilium, ischium, and pubis bones. A joint is a point of articulation between two or more bones. A foramen is an opening in a bone.