Five small hearts pump blood through the body to give oxygen and nutrients to all the cells. Other small animals get food and oxygen to their cells in different ways. Roll one die to find out how your small animal gets oxygen and nutrients to its cells. Roll one die for the number of hearts. It absorbs oxygen and food directly through its skin, and has no blood, like a flatworm.
People have sensors that detect chemicals in the air, food or water.
THey are in your nose and tongue, but chemical sensors are not always in noses or tongues. Spiders have them on the soles of their feet. Needs something with which to snip and grind plant parts. Needs to have meat tearers, like claws and sharp teeth. Needs to have both grinders and tearers.