Most cnidarians have tentacles with stinging cells surrounding their mouth. The mouth is the only body opening. All cnidarianshave radial symmetry.
Cnidarians belong to the Kingdom Animalia. They are characterized by their radial symmetry, tentacles with stinging cells called cnidocytes, and a simple nerve net.
Actually all Cnidarians have radial symmetry (able to be divided into identical pie-shaped segments) and have stinging cells. The invertebrate with no symmetry is probably a sponge, phylum Porifera.
i dont know the answer but i think its from specialized cells
Cnidarians are a phylum of invertebrate animals that includes jellyfish, corals, and sea anemones. They are characterized by their radial symmetry and specialized stinging cells called cnidocytes, which they use to capture prey. Cnidarians are found in marine environments around the world.
Some examples of cnidarians include jellyfish, sea anemones, corals, and hydra. These organisms are characterized by their radial symmetry, tentacles with stinging cells called cnidocytes, and a simple body structure with a central gastrovascular cavity.
Sea anemones exhibit radial symmetry, which allows them to capture prey from all directions. This symmetry enables their tentacles, equipped with stinging cells, to efficiently surround and immobilize food as it drifts by in the water. Additionally, their mouth is centrally located, facilitating easy access to food regardless of the direction it approaches. This adaptive trait enhances their feeding efficiency in a diverse and often unpredictable marine environment.
Examples of cnidarians include jellyfish, corals, sea anemones, and hydroids. Cnidarians are characterized by their radial symmetry and specialized stinging cells called cnidocytes that they use to capture prey.
Mollusks are defined as Bivalves. They are called Bivalves because they have two shells. Cnidarians such as Jelly Fish do not have shells which define a bivalve (mollusks).
The stinging cells in a hydra are located in the tentacles, which are cylindrical, tube-like structures surrounding the mouth of the organism. These stinging cells, called cnidocytes, contain nematocysts that can inject toxins into prey or threats.
Cnidarians belong to the animal phylum Cnidaria. They are characterized by their radial symmetry, tentacles armed with stinging cells called cnidocytes, and a simple sac-like body structure. Examples of cnidarians include jellyfish, corals, and sea anemones.
radial symmentry starfish They have Bilateral symmetry as a larvae but as they mature they get secondary symmetry. Starfish with five arms have pentaradial symmetry and sea cucumbers and ect. have radial symmetry