1. sphenoid bone
2. intramembraneous ossification - occurs on or within fibrous connective tissue membranes and form cranial bones, mandible, clavicles, skull; endochondral ossification - changing of hyaline cartilage to bone; skeletal bones except flat bones of the skull, mandible, clavicles
3.
- ball-and-socket joint
- hinge joint
- pivot joint
- condyloid joint
- saddle joint
- gliding joint