1. Which bone (yellow) is centrally located and joins with most of the other bones of the skull?
-
The bone that was shown in the video that was centrally located and joins with most of the other bones of the skull is the Sphenoid Bone
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 shown in the video are (1) Intramembranous Ossification and (2) Endochondral Ossification. Starting with the intramembranous ossification, it is the process of formation of the bone directly on the mesenchyme tissue. It usually forms flat bones and an example of this are bones found in the top portion of our skull. On the other hand, Endochondral Ossification refers to the process of the formation of bones by replacing cartilages with bones. Long bones are usually formed by this process and an example of this are our ribs and vertebrae.
3. What are the synovial joints being described in the video? Which type of synovial joint allows for the widest ranges of motion?
-
The synovial joints that were described in the video are the following: (1) ball-and-socket joint (shoulder), (2) hinge joint (knee), (3) pivot joint (neck), (4) condyloid joint (wrist), (5) saddle joint (fingers), and the (6) facet joint (vertebrae). The type that allows for the widest range of motion is the ball-and-socket joint. This is because it allows movement in all directions.