When you spin around, you lose balance because of fluid spinning around in the
cochlea
tympanic membrane
semicircular canals
auricle

The answer is semicircular canals. The part of the ear responsible for hearing and balance is the inner ear.  The inner ear is composed of three parts: the cochlea's role is for hearing, the semicircular canal is for balance and the last, the vestibule connects the two parts to other structures in the ear.

The short-term effect of tar on the body is increased blood pressure.