any invertebrate animal with a three-layered body and a pseudocoel
no they aren't. T.hey are not protostomes either deuterostomes
coelomate
Pseudocoelomate is the word used for an animal with an unlined body cavity made up of a tube surrounded by organs. A roundworm is one example of a pseudocoelomate.
A Planarian is an acoelomate, meaning they do not have a body cavity at all.
Pseudocoelomate is the word used for an animal with an unlined body cavity made up of a tube surrounded by organs.
Pseudocoelomate is the word used for an animal with an unlined body cavity made up of a tube surrounded by organs.
Pseudocoelomate is the word used for an animal with an unlined body cavity made up of a tube surrounded by organs.
Pseudocoelomate is the word used for an animal with an unlined body cavity made up of a tube surrounded by organs.
Yes. However, this is not a true coelom. Roundworms are pseudocoelomates -- their mesoderm lines the endoderm and ectoderm, but there is no connection between the two. Therefore, it does not satisfy the definition of a coelom. However, since there is a body cavity still, this animal is said to be a pseudocoelomate.
The main difference between coelomates and pseudocoelomates is different body cavities. Coelomates have fluid-filled coeloms with mesoderm linings that keep organs attached to eat other and suspended to avoid floating freely. Pseudocoelomates have "false" body cavities that allow organs to move around in an unorganized fashion.
The rotifers make up a phylum of microscopic and near-microscopic pseudocoelomate animals. They were first described by Rev. John Harris in 1696, and other forms were described by Anton van Leeuwenhoek in 1703.
Acoelomates have several disadvantages. They do not have any protective covering for their organs, no place for diffusion, and several other things. Psuedocoelomates have a fake coelom, or a coelom that was lost during evolution or mutation.