Which portion of the ear contains the sense organs for hearing and balance?

Inner ear

"The semicircular canals in the inner ear are part of our balance system. The cochlea is a bony structure shaped like a snail and filled with two fluids (endolymph and perilymph). The Organ of Corti is the sensory receptor inside the cochlea which holds the hair cells, the nerve receptors for hearing." -asha.org

Ithink due to shortage of water

1. protection 2. homeostasis 3. storage4.blood formation5.bone marrow 6.movement