The Annamaya Kosha constitutes the gross physical body. The Pranamaya, the Manomaya and the Vijnanamaya Koshas constitute the Linga Sarira or subtle body (astral body). The Anandamaya Kosha constitutes the causal body (Karana Sarira).
The physical body is formed of the essence of food. The subtle body is formed of unquintuplicated, Apanchikrita or uncompounded elements. The casual body is formed of Samskaras or Moola Ajnana (primitive ignorance). The Anandamaya Kosha is the cause for the subtle and gross bodies or the remaining four sheaths.