Respuesta :
The answer is Pseudocoelomate
A Pseudocoelomate is not fully lined by mesoderm.
This category of animals have a pseudocoelom which gave them a hydrostatic pressure to give their body a supportive framework that could acts as a skeleton.
A Pseudocoelomate is not fully lined by mesoderm.
This category of animals have a pseudocoelom which gave them a hydrostatic pressure to give their body a supportive framework that could acts as a skeleton.