Flatworms

Biology

Taxonomic Groups of Platyhelminthes (1)

Class Turbellaria - Planarians

Taxonomic Groups of Platyhelminthes (2)

Class Trematoda - Flukes

Taxonomic Groups of Platyhelminthes (3)

Class Cestodea - Tapeworms

Taxonomic Groups of Platyhelminthes (4)

Class Monogenea 

Cephalization

development of the head

acoelomates - without coelom

coelom - body cavity that is lined with mesoderm

mesoderm - middle germ layer that gives rise to muscles, circulatory, excretory, and reproductive systems

Parts that make up the digestive system in Flatworms 

mouth, pharynx, intestine

flame cells

specialized cells that remove excess water and metabolic waste

Turbellaria

free living while some dwell in marine environment or forest floor

Trematoda-Flukes

Parasitic flatworms which dwell on the internal organs of the host

Cestodea - Tapeworms

long, flat parasitic worms that are adapted to life inside the intestines of their hosts

The species of Schistosoma that ravages world population

Japonicum, Mansoni, Haematobium

The name of organ of attachment in tapeworm

Scolex (head)

unsegmented region with high regenerative capacity

the neck

Monogenea

Anterior and posterior ends for clinging, but life cycle remains simple, with a single free living larval stage

The name of the clade of the three parasitic platyhelminths (Cestoda, Mondogenea, Trematoda) 

Neodermata 

Free-living worms

have well developed digestive and nervous systems to seek out and process food

Parasitic tapeworms

rely on host’s digestive system to process food

The characteristics within a tapeworm's proglottid that make them hermaphroditic

Both sexes present in same flatworms