<span>The hormone aldosterone is one of the causes of hypernatremia, which in layman's terms is excessive blood sodium ion concentration. Aldosterone is typically secreted naturally in the body by adrenal glands and sometimes in excess by benign (non-cancerous) adrenal tumors.</span>
They do not have a distinct head and thorax but a fused version of the two called a cephalothorax. That's one of the major differences between insects and crustaceans, both being subgroups of arthropods.
