Watch this video to view a rotating and exploded skull with color-coded bones. Which bone (yellow) is centrally located and joins with most of the other bones of the skull? The link of the video at the study guide.
- The sphenoid bone is the centrally located and the one who joins with most of other bones in the skull.
View another video to review the two processes that give rise to the bones of the skull and the body. The access of the video is in the study guide. Answer this question:
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 involved in the Bone formation are the following: (1) Intramembranous Ossification and (2) Endochondral Ossification. In Intramembranous Ossification, it occurs in many bones of the skull and clavicles. Bone is generated on or between the fibrous connective tissue membranes. IN here, the trabeculae fuse to form the spongy bone. The periosteum also forms outside the bone. The Intramembranous Ossification also occurs in skull bones during childhood. On the other hand, Endochondral Ossification, the replacement of cartilage by the bone, occurs in most of the rest of the skeleton.
Watch another video (link at the study guide) to see an animation of synovial joints in action. Answer the following questions after watching the video.
What are the synovial joints being described in the video?
- The synovial joints being described are the following: The ball-and-socket joint, The hinge joint, the plane joint, the pivot joint, the condyloid joint, and the saddle joint.
Which type of synovial joint allows for the widest ranges of motion?
- The ball-and-socket joint. This joint as the name implies, is rounded, ball-like end of one fitting into a socket of another bone. This joint provides widest ranges of motion because of its structure, and this allows movement in all of the three planes.