When a person is dehydrated, you can notice a drop in their breathing rate, their stamina, urination decreases, they become less aware, and their overall energy level decreases.
Example: your friend asked if her dress looked good on her and you said no. this hurt her feelings but you were trying to help by being honest.
External or internal and an example is how you feel about yourself I think
No it cannot lead to inflammation.
The muscular system is the organ system that is composed of tissue and can contract and relax.