The beautiful sea stars (“starfish”), classified as echinoderms, are one of the most easily identifiable marine invertebrates, with their characteristic radiating arms and stony skin of calcium carbonate. The sea star’s water vascular system is one of the more amazing and complex arrangements in the animal world.

The element nitrogen is critical in the living world. It is a basic building block of structural and regulatory proteins, nucleic acids, and chlorophyll in plants. God created the nitrogen metabolic networks found in people and various living organisms.