<span>The mammalian sperm cell consists of a head, a midpiece and a tail. The head contains the nucleus with densely coiled chromatin fibres, surrounded anteriorly by an acrosome, which contains enzymes used for penetrating the female egg.</span>
Caloric heat and ultraviolet heat have nothing to do with water changing state, and I don't think 'evaporation heat' is even a thing. Hope this'll help.
