Anatomy+and+function+of+the+human+ear


 * **the structure of ears** ||




 * ** Name ** || ** Structure ** || ** Function ** ||
 * Pinna ||  || mnm ||
 * Ear canal || * Tube leading from Pinna to Tympanic membrane || * Channels sound waves towards the tympanic membrane.
 * Provides a waxy substance to protect and lube the ear. ||
 * Tympanic membrane || * Situated between the external ear and the middle ear. || * Vibrate with the same frequency as the sound wave that hits it.
 * Provides an air tight protection between the external and middle ear. ||
 * Ear ossicles || * Consists of three main bones in the middle ear known as the malleus (hammer), the incus (Anuil), and stape (Stirrup). || * Transfers the vibrations from the tympanic membrane to the middle of the ear to the oval window. ||
 * Oval window || * Small, thin membrane situated between the middle and inner ear. || * Receives the vibration from the tympanic membrane via the ossicles. ||
 * Round window || * Situated just below the oval window. || * Acts like a piston to transfer the vibration from the oval window to the fluid in the inner ear. ||
 * Cochlea || * A long tube wound around itself that is filled with liquid (perilymph). || * The fluid in the cochlea transfers the vibrations to the hairs in organ of corti ||
 * Organ of Corti || * Situated inside the cochlea.
 * Contains millions of receptors hair cells that are attached to nerves. || * Hairs are tuned to certain wave frequency. When the wave pass over the hair an electric signal is triggered. ||
 * Auditory nerve || · A bundle of nerve fibers bound together. || * Sends the electrical signals to the brain to be interpreted. ||
 * Eustachian tube || * A long marrow tube that opens in middle ear which leads to the pharynx. || * To equalise the pressure between the outer and inner ear. ||