Phylum Platyhelminthes Flatworms Flukes Tapeworms Phylum Platyhelminthes
Phylum Platyhelminthes
Phylum Platyhelminthes
Phylum Platyhelminthes
Phylum Platyhelminthes
Phylum Platyhelminthes Flatworm Body Plans Exhibit bilateral symmetry, acoelomate and……… Phylum Platyhelminthes
Phylum Platyhelminthes Regeneration Many species posses remarkable powers of regeneration and repair wounds Phylum Platyhelminthes
Phylum Platyhelminthes Planarians are capable of asexual reproduction via fission Phylum Platyhelminthes
Phylum Platyhelminthes Reproduction Almost all are simultaneous hermaphrodites Parasitic species (flukes and tapeworms) have complex lifecycles, Phylum Platyhelminthes
Phylum Platyhelminthes Nervous System Free-living species usually have a well-developed sensory system Parasites generally have less elaborate systems. WHY? Phylum Platyhelminthes
Phylum Platyhelminthes Flatworms Some species also have a protrusible pharynx that captures food and transfers it into the mouth Can be carnivores or scavenge on dead animals and detritus Phylum Platyhelminthes
Phylum Platyhelminthes Tapeworms Phylum Platyhelminthes
Phylum Platyhelminthes Beef tapeworm Phylum Platyhelminthes
Problems of a parasitic existence Must reproduce within the definitive host Must get fertilized eggs out of the host Finding a new and appropriate host Obtain entrance into the host Locate the appropriate environment within the host Maintain position within the host Withstand an often anaerobic environment Avoid digestion or attack by the hosts immune system Avoid killing the host, at least until reproduction is completed Phylum Platyhelminthes