Not necessarily, although its symbol is the water carrier, Aquarius is an AIR sign.  The water in Aquarius is symbolic of knowledge, especially spiritual.  Swimming in water â¦ is using it for a different purpose to, e.g. carrying it in a container. Someone carrying water in a container need not even be able to swim.
hormone. a chemical transmitter substance produced by cells of the body and transported by the bloodstream to the cells and organs on which it has a specific regulatory effect. adj., adj hormoÂ´nal. Hormones act as chemical messengers to body organs, stimulating certain life processes and retarding others.
Extracellular messengers: Cells send out signals in the form of speciï¬c. messenger molecules that the target cell transmits into a biochemical reaction. Signaling cells can simultaneously inï¬uence many cells by messenger molecules. so as to enable a temporally coordinated reaction in an organism.