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Full Text. The hyoid bone is a horseshoe shaped bone found in the neck. Located anteriorly between the mandible and the thyroid cartilage, the hyoid bone protects the esophagus and also facilitates the wide range of muscle activity required for speaking and swallowing. It is visible upon extension of the neck.
1.Primary cartilaginous joints(= synchondroses): A plate of hyaline cartilage connects the bones at the joint. Only hyaline cartilage is involved, and the joints are immoveable. An example is the cartilaginous epiphyseal plate which separates the epiphysis from the diaphysis in long bones during growth..Secondary cartilaginous joints(= symphyses). It involves both hyaline and fibrocartilage. The articular surface of each bone is covered with a thin layer of hyaline cartilage, and fibrocartilage unites these two layers.