Flashcards in Platyhelminthes Deck (6)
3 cell layers, ectoderm, endoderm, mesoderm
Simples animals with bilateral symmetry, an anterior end
No room for...
True digestive or respiratory systems to circulate food or oxygen
How do flatworms solve problem of no digestive or respiratory systems?
The body is so flat and thin that many body cells can exchange nutrients and wastes by diffusion with the environment