An overview of the three worm phylums: platyhelminthes, nematoda and annelida.

1. WORMS

3. FLATWORMS

4. A beautifully coloured flatworm ( Pseudoceros sp.) at Papua New Guinea The flatworm in this picture, Pseudoceros ferrugineus, was photographed in the oceans off the coast of the Philippines. Most flatworms are free-living like this one, but there are also many parasitic flatworms that live for at least part of their lives inside a host. Candy Stripe Flatworm Magic Carpet Ride - Flatworm Divided Flatworm is very common and is considered poisonou s

5. ROUNDWORMS

6. Bacterial-feeding nematodes, Magnified about 30x Pinworms are common human intestinal parasites, especially in children. Ascaris lumbricoides is an intestinal roundworm of huamns and is estimated to infect ~1/4 of the worlds population. Females can produce upto 2,000,000 eggs per day which are passed into the host's faeces.

7. SEGMENTED WORMS

8. Medicinal Leech Earthworm Sandworm / Marine Worm