What is the body of written works that includes prose and poetry?

The body of written works that includes prose and poetry is called literature.

Here's a breakdown:

* Literature encompasses all written works, including:

* Prose: Written in a regular grammatical sentence structure, with no rhythmic or metrical pattern. Examples include novels, short stories, essays, and biographies.

* Poetry: Written in a structured form with rhythmic and metrical patterns. Examples include sonnets, haikus, odes, and epics.

Therefore, literature is the broad term that encompasses both prose and poetry, and many other forms of written expression.