Flat worms Planarian

• Flatworm Characteristics
• Flat bodies (gases move by diffusion)
• bilateral symmetry
• gastrovascular cavity
• some flatworms are parasitic, some are free living
• they have anterior and posterior heads and exhibit cephalization
• Planarian (also known as Dugesia) – lives in freshwater
• mostly a scavenger, also feeds on protists hermaphrodites
• has a simple brain (ganglia) and nervous system, plus 2 eyespots they can regenerate (regrow parts)