What Is Meaning Of Acoelomate?
The meaning of the term acoelomate is that it is an invertebrate lacking a coelom especially, one belonging to the group comprising the flatworms and nemerteans and characterized by bilateral symmetry and a digestive cavity that is the only internal cavity.
In simpler words, we can also define the term acoelomate as it is an animal that does not possess a body cavity. The specific example of the acoelomate animal is a flatworm and the parasitic tapeworm.
True body cavities form only in multicellular organisms with true tissues. Within this group, the eumetozoa, there are organisms like coral and jellyfish, which consists of only 2 basic tissues. There are various types of acoelomates such as Pork tapeworm, Lion’s mane jellyfish, Portuguese man o’ war, Moon jelly, Turritopsis nutricula, Echinococcus granulosus, Taenia saginata, etc.
The acoelomate phyla are Placozoa, Porifera, Cnidaria, Ctenophora, Platyhelminthes, Mensozoa, Nemertina, and Gnathostomulida. In a simpler definition, acoelomate is the simplest form of animals that have 3 true tissues namely, endoderm, mesoderm, and ectoderm, in that order from inside to out. In an acoelomate, these tissues touch each other back-to-back, without any space in between them. The organs are surrounded by mesoderm, where the ectoderm is the skin, while the endoderm forms the digestive tract.
Are Humans Acoelomate?
Thus, humans are coelomates. They are not pseudocoelomates.
Which Is An Acoelomate Animal Name?
Platyhelminthes and sponges are classic examples of acoelomates.
Is Cockroach An Acoelomate?
The body of the cockroach consists of true coelom. It means that the body contains a cavity which is present in between the digestive system and the body wall.
Is Earthworm An Acoelomate?
These organisms do not have a coelom (between the body wall and gut wall) or body cavity. Earthworm: It belongs to the phylum annelida. These organisms have a true coelom and hence are known as coelomates.