Platyhelminthes
Platyhelminthes are also known as "flatworms."
They are soft bodied, invertebrate animals. They have no specialized circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion.
Platyhelminthes are also known as "flatworms."
They are soft bodied, invertebrate animals. They have no specialized circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion.