...internal environment...? After understanding about homeostasis and how the body maintains a constant internal environment, what can we learn from this and apply to our daily lives?
Though unhealthy, we can take from this a comfort in the fact that anything reasonable that we do to disrupt our bodies equilibrium can be fixed naturally.
You can go into the hot sun or a cold pool without worrying about your body temperature. You can drink a soda and not worry about the salt imbalance in your body, or drink lemonade without worrying about your pH. You can instead focus on enjoying life.
Body maintains its internal environment through hormonal activity and brain regulates all this activity and other glands also takes part in this hormonal activity.