Diagram the life cycle for a blood fluke and identify all of the stages that the fluke goes through. Compare and contrast this life cycle to that of a beef tapeworm.

Concepts to Consider: The blood fluke life cycle starting with infection of human from swimming or wading in contaminated water; sexual reproduction within the human host producing eggs (containing embryos) that are excreted in the feces; development of the eggs into free-swimming larvae in freshwater systems; infection of a freshwater snail; asexual reproduction within this host and the release of large numbers of larvae into the surrounding water. Differences for the tapeworm life cycle include mode of infection (eating poorly cooked beef); both hosts are vertebrates; no aquatic component to the life cycle; no free-swimming larval stages. Similarities include two hosts; infection of humans; release of embryos in human feces; infection due to contamination (of water or land are
A) by human waste.