Other messages may be relayed to parts of the body registering the oils' physical effects. Aromatic particles also travel down the nasal passages to the lungs. When rubbed into the skin, or when dispersed in water, tiny essential oil molecules readily permeate the skin. Via the pores and hair follicles, they can reach the fine, blood-carrying capillaries. Once in the bloodstream, they are transported round the body and filtered through to the cells and body fluids.
Mucous membranes are also receptive to essential oils.