Smooth muscles, also known as nonstraited, are involuntary muscles due to the reason that you can't control these muscle movements. Examples of where these muscles might by are by the internal organs or even places such as your blood vessels.
I think it's hinge I'm not so sure though :/
Make it attainable by setting a more realistic expectation.
Explanation:
stomachs problems after eating acidic foods,(tomatoes, oranges & other citric fruits & veggies).
