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.
Any kind of homeostatic imbalance in the body could trigger severe illnesses. An internal state of balance is maintained by a term called homeostasis. In order for the body to be balanced, it must maintain five functions. (1) atmospheric pressure (2) nutrients (3) oxygen (4) water (5) body temperature.