The endocrine systems of vertebrates and higher invertebrates may have evolved functionally
from as far back on the evolutionary scale as bacteria and early multicellular organisms
and their biological communities, which have been shown to produce a variety of cyclic
nucleotides, peptides, fatty acids, prostaglandins and sterols with endocrine-altering
effects in primative as well as more highly evolved species.
Endocrinology - Evolution - Toxins - Pheromones - Differentiating factors - Hormones
- Microorganisms - Invertebrates - Vertebrates
