Technically, interjections are not considered one of the traditional eight parts of speech. The traditional eight are:
* Noun
* Pronoun
* Verb
* Adjective
* Adverb
* Preposition
* Conjunction
* Interjection
However, interjections are often grouped with the eight parts of speech because they are a distinct category of words that express strong emotions or feelings.
So, while they aren't one of the *core* eight, they're definitely still important and worth understanding!