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Both of these are in the ear. The semi-circular canals help you to balance and the cochlea transmits nerve signals to the brain. This is how you hear. The inner ear is subdivided into the vestibule, semicircular canals, and cochlea. The semicircular canals and cochlea are separate structures with different functions. The receptors for balance are in the semicircular canals, and the organ of Corti (the organ of hearing) is in the cochlea.
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They are part of the microscopic structure of compact bone. Compact bone is solid, dense, and smooth.The structural unit of compact bone is the Haversian system or Osteon. These are elongated cylinders cemented together to form the long axis of a bone.Components of Haversian system consists of osteocytes (spider-shaped bone cells that lie in "lacunae") that have laid down a matrix of collagen and calcium salts in concentric lamellae (layers) around a central Haversian canal containing blood vessels and nerves.Each system has communicating canals within compact bone with other systems.
Water locks allow ships to move from one level of water to another through canals.
Outer-Pinna (ear flap)Meatus (ear canal)Middle-Eardrum(3 tiny bones)*Anvil*Hammer*StirrupInner-CochleaSemicircular Canals (horizontal, superior, posterior)Auditory Nerve