name three ear ossicles. how did they contribute in the mechanism of hearing
Answers
The three tiniest bones in the body form the coupling between the vibration of the eardrum and the forces exerted on the oval window of the inner ear. Formally namedthe malleus, incus, and stapes,
Sounds enter the ear canal
Sound waves move through the ear canal and strike the eardrum.The ear drum and bones of hearing vibrate
These sound waves cause the eardrum, and the three bones (ossicles) within the middle ear, to vibrate.Fluid moves through the inner ear
The vibrations move through the fluid in the spiral shaped inner ear – known as the cochlea – and cause the tiny hair cells in the cochlea to move. The hair cells detect the movement and change it into the chemical signals for the hearing nerve.Hearing nerves communicate to the brain
The hearing nerve then sends the information to the brain with electrical impulses, where they are interpreted as sound.
The ear is the organ of hearing and, in mammals, balance. In mammals, the ear is usually described as having three parts—the outer ear, middle earand the inner ear. The outer ear consists of the pinna and the ear canal. Since the outer ear is the only visible portion of the ear in most animals, the word "ear" often refers to the external part alone.[1]The middle ear includes the tympanic cavity and the three ossicles. The inner ear sits in the bony labyrinth, and contains structures which are key to several senses: the semicircular canals, which enable balance and eye tracking when moving; the utricle and saccule, which enable balance when stationary; and the cochlea, which enables hearing. The ears of vertebrates are placed somewhat symmetrically on either side of the head, an arrangement that aids sound localisation.