Question

what does the term coelentrata means?

Answer 1

ANSWER....

""COELENTRATA"" is a phyllum.

➡ It is also called CNIDARIA ( The Sac-like animals)

➡ They includes the hydroids, jelly fish, sea anemones and corals.

➡ They may be solitary or colonial.

➡ They are usually marine and radially symmetrical.

➡ They are sessile or free swimming.

➡ They have tissue level of organisation.

➡ They are Diplobalstic with mesoglea.

➡ Digestion extracellular and intracellular.

➡ They have a central gastro-vascular cavity and an opening, hypostome.

➡ Body wall of some composed of calcium carbonate, e.g. corals.

➡ They exhibit two body forms : polyp and medusa e.g. Hydra and Aurelia.

☛ The Best Choice ✔✔

☆☆ @ Mr. Thakur ☆☆

Answer 2

Coelenterata is an obsolete term encompassing the animal phyla Cnidaria(coral animals, true jellies, sea anemones, sea pens, and their allies) and Ctenophora (comb jellies). The name comes from the Greek"koilos" ("hollow") and "enteron" ("intestine"), referring to the hollow body cavity common to these two phyla.[1][2] They have very simple tissue organization, with only two layers of cells (external and internal), and radial symmetry. Some examples are corals, which are typically colonial, and hydra, jelly fish and sea anemones which are solitary. Coelenterata lack a specialized circulatory system relying instead on diffusion across the tissue layers.