| The helminths differ from other infectious organisms in that they have a complex body structure. |
| The eggs of helminths, many of which are resistant to environmental conditions, require a period of time outside of the body. |
| The cnidarians and helminths have a sac-like digestive system with a single opening. |
| Harmless worms called helminths can also be useful in helping to train the immune system. |
| Humans and other animals have been living with helminths, or worms, since the dawn of time, and our intestinal tracts have adapted to their presence. |
| The life history patterns of helminths interact with invasion pathways to determine the potential for introduction. |
