They are related.
- All types of “bodies” (kaya) of living beings in various realms arise based on pancupadanakkhandha (PUK).
- Humans and animals have a dense physical body as well as a mental body. Devas have less dense physical bodies, and Brahmas have mostly the mental body.
- Kayagatasati Sutta points out that all types of “bodies” (kaya) have their origin in PUK.
- Satipatthana Sutta describes the way to stop the arising of any type of such bodies because none of them can provide a refuge from suffering in the rebirth process.
