The atria receive blood from various parts of the body and pass it into the ventricles. The ventricles, in turn, pump blood to the lungs and to the remainder of the body. The right atrium, or right superior portion of the heart, is a thin-walled chamber receiving blood from all tissues except the lungs.
The Vestibule and Semicircular Canals. While the cochlea is involved in hearing, the other two parts of the inner ear's bony labyrinth, the vestibule and semicircular canals, are involved in keeping you upright-your sense of balance, that is. The vestibule detects changes in linear acceleration-that is to say, movement in one direction.
Process of Equilibrium [edit]. Equilibrioception or sense of balance is one of the physiological senses. It allows humans and animals to walk without falling. Some animals are better in this than humans, for example allowing a cat (as a quadruped using its inner ear and tail) to walk on a thin fence.