Question

give the functions of a)ear drum b)cochlear fluid in human ear

Answer 1

 the eardrum, also called thetympanic membrane or myringa, is a thin, cone-shaped membrane that separates theexternal ear from the middle ear. Its function is to transmit sound from the air to theossicles inside the middle ear, and then to theoval window in the fluid-filled cochlea. Hence, it ultimately converts and amplifies vibration in air to vibration in fluid. The malleus bone bridges the gap between the eardrum and the other ossicles.
The cochlear canals contain two types of fluid: perilymph and endolymph. Perilymph has a similar ionic composition as extracellular fluid found elsewhere in the body and fills the scalae tympani and vestibuli. Endolymph, found inside the cochlear duct (scala media), has a unique composition not found elsewhere in the body.