The second side of the album includes three shorter tracks written by individual band members: "If" by Roger Waters, "Summer '68" by Richard Wright, and "Fat Old Sun" by David Gilmour. These songs provide a contrast to the grandiosity of the title track with their more traditional song structures and introspective lyrics. The album concludes with the avant-garde "Alan's Psychedelic Breakfast," a three-part instrumental and sound collage featuring the sounds of band roadie Alan Styles preparing and eating breakfast. "Atom Heart Mother" reached number one on the UK Albums Chart and has been seen as a pivotal work in the band's early catalog, reflecting their evolving musical ambition.