This band is an Olivia Tremor Control offshoot lead by William Cullen Hart. Jeff Mangum appeared on Circulatory System's first album (drums and backing vocals), and was the drummer in the initial live incarnation of the band when they toured the East Coast in Fall 2001. In the Fall of 2002, they did a West Coast tour with Derek Almstead replacing Jeff Mangum on drums, and in the Spring of 2003 they did an East Coast tour opening for The Sea & Cake with Philip Brown sitting in for Derek Almstead on drums. They are currently recording a new record to be released in Spring 2005.