Usage examples (19)

• Here I'll add just one new point, illustrated by the flatworms, Platyhelminthes.
• The phylum Platyhelminthes contains both parasitic worms and the free living flatworms.
• Digeneans, like most other Platyhelminthes, have no special provisions for circulation but do have a lymphatic system.
• All of these groups of Platyhelminthes are parasitic and have adapted their life cycles and body structures to help them better utilize their hosts.