What are the differences between planaria and tapeworms structural and functional?

Planaria are free-living flatworms with a simple body structure, featuring a distinct head with eye spots and a mouth located on the underside. They have a well-developed nervous system and can regenerate lost body parts. In contrast, tapeworms are parasitic flatworms lacking a digestive system; they absorb nutrients directly through their skin from the host's intestines. Structurally, tapeworms have a segmented body made up of proglottids, which contain reproductive organs, allowing them to reproduce efficiently within their host.