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The statement "The oval window, saccule, and utricle are all found in the vestibule of the osseous labyrinth" is **False**.
Explanation:
1. The oval window is not located in the vestibule; it is a membrane-covered opening between the middle ear and the inner ear.
2. The saccule and utricle are parts of the membranous labyrinth within the inner ear, responsible for sensing linear acceleration and head position, respectively.
3. The vestibule, in the inner ear, contains the saccule and utricle but not the oval window.
Therefore, the components mentioned in the statement are not all found in the vestibule of the osseous labyrinth. The correct placement of these structures helps maintain proper balance and equilibrium in the human body.