1. Which bone is centrally located and joins with most of the other bones of the skull?
Commonly regarded as the most complex bone in the human body, the sphenoid bone is located at the base of the central skull. It serves as a conduit for various cranial nerves and serves as a boundary between intracranial and extracranial structures. The sphenoid bone is a single bone. Its body articulates with the temporal and occipital bones to create the base of the skull. It also joins the zygomatic bones to form the lateral walls of the orbits.
2. What are the two mechanisms by which the bones of the body are formed and which bones are formed by each mechanism?
The two mechanisms of bone formation are intramembranous and endochondral. Intramembranous ossification is a type of bone formation in which mesenchymal tissue is converted directly into bone. It forms the flat bones of the skull, clavicle, and most of the cranial bones. Endochondral ossification occurs as a result of a cartilage intermediate that is replaced by bone. Endochondral ossification is the mechanism responsible for the formation of all long bones of the axial skeleton and the appendicular skeleton.
3. What are the synovial joints being described in the video?
The synovial joints described in the vide are plantar, hinge, pivot, condyloid, saddle, and ball and socket.
4. Which type of synovial joint allows for the widest ranges of motion?
Ball and socket joints allow for the greatest range of motion.