Interjections (sometimes called exclamations) are used to express strong feeling or emotion, usually that occurs quickly.
Don’t touch that!
For more information about the different parts of speech take a look at
Other links for Interjections
XX List of Common Interjections
XX Definition of Interjection
XX Function of Interjection
An explanation of an interjction- including their function, type, placement and formation– www.understandinggrammar.com