Platyhelminthes
The life journey of the animals in this episode is quite different. They live in the kidneys of humans or other animals.
However, some animals live inside or outside the organism as free-living
Some species of this organism live in wet soils again
Example: tapeworm, liver worm
Features
- Their bodies are intact, bilaterally symmetrical and pressed up and down.
- The body is much like a ribbon, leaf or blade.
- These are three-layered animals, i.e. three germinal layers are found in their embryos.
- The body cavity, the siloma, is absent, and the space between the internal organs is filled with mesenchyme.
- The body is covered by the synovial membrane.
- The excretory organ is protonefridium and there are many flame cells that participate in excretory function.
- Most animals use a hook-like sucking limb attached to the host's body at the front end.
- Nutrition is incomplete or absent.
- Respiratory and circulatory systems are missing.
photo :googol
