Under the circumstances that one can relate the majority of the human and its functions to both more macroscopic and microscopic formations, such as cells, ants, plants and the larger planets, solar systems, galaxies and universi, What is the emotional experience of sadness, that is: to bring about a shedding of water from the visual organs of the organism, the human being, which is a physical reaction to an emotional reaction to a mental construct?  What is crying?  Do cells cry in the way that cells cry?  Do ants cry in the way that ants cry? Do solar systems shed something to express a type of sadness that a solar system might express?
 
Also, why cry out of happy emotional reactions as well?
I don't get it.