Learn about the phylums Platyhelminthes and Nematoda

This is a Planaria, which is an example of an invertebrate in the Platyhelminthes phylum
Platyhelminthes

Kingdom- Animilia

Phylum- Platyhelminthes

Classes- Calcispongiae, Hexactinellida, and Demospongiae

Domain-Eukarya


Flatworms are unsegmented, bilaterally symmetrical worms have three germ layers. Some forms are free living but many are parasitic.


Body Plan Symmetry Organ Systems Body Openings Unique Features
  • invertebrate
  • flattened bodies
  • bilaterally symmetrical
  • do not have a body cavity
  • primitive brains compsed of nervous tissue
  • lack a complete digestive tract
  • planarian-one body opening
  • blood fluke-two body openings
  • tapeworms-one body opening
  • most are parasites
  • tapeworms cause Trchinosis
  • blood flukes cause Schistosomiasis

this is a planarian


Nematoda

This is a roundworm, which is an example of an invertebrate in the Nematoda phylum

Kingdom- Animilia

Phylum- Platyhelminthes

classes-Secernentea and Adenophorea

Domain-Eukarya

Nematodes, also known as round worms, are one of the most abundant groups of animals.

Body Plan Symmetry Organ Systems Body Openings Unique Features
  • invertebrate
  • rounded bodies
  • slender and tapered at both ends
  • tubular and have a mouth and anus
  • bilaterally symmetrical
  • have a psrudocelom (digestive tract)
  • have two body openings
  • carry Ascariasis
  • found in soil, animals, plants, and salt water
  • reproduce sexually

Home
Hosted by www.Geocities.ws

1