Activity 3. Exercises
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Which bone (yellow) is centrally located and joins with most of the other bones of the skull? — The sphenoid bone
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.
1. Intramembranous ossification - occurs on or within fibrous connective tissue membranes. It forms spongy bones, red bone marrow, and compact bone (but has a spongy center). It also occurs in skull bones during childhood.
2. Endochondral ossification - the replacement of cartilage with bone. Bones are first formed as hyaline cartilage. It forms the diaphysis of a long bone. It forms the long bones of the axial skeleton, ribs and vertebrae, and the limbs.
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:
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What are the synovial joints being described in the video?
- plane, hinge, pivot, condyloid, saddle, and ball-and-socket
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Which type of synovial joint allows for the widest ranges of motion?
- the ball-and-socket synovial joint