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 lies at the middle portion of the skull’s base, which enables it to help in connecting the neurocranium to the facial skeleton.
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 that contribute to the formation of the bones are intramembranous ossification and endochondral ossification.
In intramembranous ossification, the bones are developed from sheets of mesenchymal connective tissue or fibrous membranes.
On the other hand, endochondral ossification involves forming a bone through a cartilage intermediate.
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? Which type of synovial joint allows for the widest ranges of motion?
The following are the synovial joints that were seen in the video:
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Ball-and-socket joint
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Hinge joint
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Pivot joint
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Condylar or condyloid joint
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Saddle joint
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Gliding joint
Compared to these six, the ball-and-socket joint allows the widest range of motion due to its structure. Its cup-like socket and labrum make it possible to move in all directions.