BIOC17H3 Lecture Notes - Lecture 5: Tensor Tympani Muscle, Vestibular Duct, Cochlear Duct
14 Sep 2016
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Document Summary
One role is hearing, and the other role is equilibrium system of the body. Anatomy of the ear: divided up into three parts. External ear: pinna (flexible that is sticking outside of the head), canal. Their function is to get sound information from the environment to the middle ear. Middle ear: ear drum that is first going to take sound energy and convert it into mechanical energy which will be converted into electrical signal. Then there are 3 bones in your middle ear which transmits sound through to inner ear. Two of these bones originate from the jaw of the ancestor. The other two bones came from jaw of the reptiles. They got multiplied, we only have one though. Cochlea is a part of the inner ear that will allow us to hear. Vestibulocochlear nerve will be carrying the sensory info to the brain. The eustachian tube connects middle ear to the pharynx.
