Uller Uprising

by H. Beam Piper

6. ANIMALS AND ANIMAL METABOLISM

Animals depend upon two main reactions for their energy, and for the construction of their harder tissues. The soft tissues are about the same as the plant molecules, but the hard tissues are produced by the reaction:

resulting in a teflon boned and shelled organism. He's going to be tough to do much with. Diatoms leave strata of powdered teflon. The main energy reaction is:

The blood catalyst metal is titanium, which results in colorless arterial blood and violet veinous, as the titanium flips back and forth between tri and tetra-valent states.