What is the structure and function of a 13th chord in music theory?

A 13th chord in Music Theory is a chord that includes the root, third, fifth, seventh, ninth, eleventh, and thirteenth notes of a scale. It is a complex and rich-sounding chord that adds color and tension to a musical piece. The structure of a 13th chord gives it a jazzy and sophisticated sound, often used in jazz and other genres to create a sense of depth and complexity in the music.