Animals within the Bilateria are divided into 3 based on the presence of coelom.
Coelom
The coelom is a body cavity found in some bilaterally symmetrical animals. The 3 categories of animals found within the Bilateria include:
- Coelomates: those that have true body cavity or coelom
- Pseudocoelomates: those with false body cavity or coelom
- Acoelomates: bilateria without body cavity
More on Bilateria can be found here: https://brainly.com/question/2375349?referrer=searchResults
