Explain why the immune systems of most people do not injure their own cells

because those people have stronger immune systems

Explanation:

if their immune system injures their cell, this is called auto-immune. it's most likely not to happen though

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.