1. The bone that is centrally located is the sphenoid bone.
2. Intramembranous Ossification and Endochondral Ossification. In Intramembranous ossification, it forms spongy bones and is replaced by Compact bones. In Endochondral ossification, it forms the bone collar and periosteum
3. The synovial joints in the video are hinge joint, pivot joint, plantar joint. The type of synovial joint that allows the widest ranges of motion is the ball and socket joint.