Platyhelminthes
Platyhelminthes are soft bodied invertebrates, also known as worms. There are many types of Platyhelminthes, such as flatworms and tapeworms. They possess no type of respiratory organs.
Platyhelminthes are soft bodied invertebrates, also known as worms. There are many types of Platyhelminthes, such as flatworms and tapeworms. They possess no type of respiratory organs.