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Which bone (yellow) is centrally located and joins with most of the other bones of the skull?
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The single, intricate sphenoid bone is located in the middle of the skull. It links with practically all of the other skull bones, making it a "keystone" bone. The sphenoid extends laterally to contribute to the sides of the skull as well as forming a large portion of the base of the central skull.
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What are the two mechanisms by which the bones of the body are formed and which bones are formed by each mechanism?
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Intramembranous Ossification: Mesenchyme is directly converted to bones throughout this process. Intramembranous ossification is responsible for the formation of the flat facial bones, the majority of the cranial bones, and the clavicles (collarbones).
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Endochondral Ossification: In this procedure, bone is used to replace hyaline cartilage. The process is best visible in long bones like the axial skeleton (vertebrae and ribs) and the appendicular skeleton, which makes up the majority of the body's bones (limbs).
3. 1. What are the synovial joints being described 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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Condyloid joint
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Saddle joint
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Gliding joint
3. 2. Which type of synovial joint allows for the widest ranges of motion?
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Ball-and-socket joints have rounded, ball-like ends of one bone that fit into a cup-like socket of another bone, allowing the widest range of motion.