The gastrovascular cavity acts as a hydrostatic skeleton against which the contractile cells work.
The hydras are gone.
there is not even hydras on clubpenguin
Hydras do not have a skeleton. They are multicellular organisms that belong to the phylum Cnidaria and are characterized by a simple body structure without bones or hard structures. Hydras have a flexible body made up of a layer of cells surrounding a central digestive cavity.
hydras have testes to produce and release sperm and ovaries to produce and release eggs
Yes.
The kingdom is animalia.
They are gone.
Humans and hydras have distinct digestive processes due to their anatomical differences. Humans possess a complex digestive system with specialized organs, such as the stomach and intestines, where food is broken down and nutrients are absorbed. In contrast, hydras have a simpler, two-way digestive system with a single opening that serves both ingestion and excretion, relying on extracellular digestion in their gastrovascular cavity. This allows hydras to digest food more directly and absorb nutrients directly into their cells.
hydras carry out asexual reproduction (binary fission) whereas mammals carry out sexual reproduction (mating)
invertibrates
Cnidarians
Hydras are acoelomates.