For example a thermostat which can track the temperature within a household or food so it doesn't go bad.Another example could be a water filter which acts like a kidney when your going to the restroom it gets rid of useless or unhealthy substances so you can drink unharmful water to stay healthy!
Digestion is the breakdown of food into simpler molecules that can be absorbed by the body. It starts the process of mechanical digestion by grinding the food with teeth. Also in the mouth, an enzyme called salivary amylase begins to break down long starch molecules into maltose.
