Question

what are coelentrata?​

Answer 1

Coelenterata is a term encompassing the animal phyla Cnidaria and Ctenophora. The name comes from Ancient Greek: κοῖλος, romanized: koilos, lit. 'hollow' and ἔντερον, enteron, 'intestine', referring to the hollow body cavity common to these two phyla.

Answer 2

Coelontrata-

→ Body organisation is of tissue level.

→ These are also called cnidaria. Name cnidaria was derived from cnidoblasts or cnidocytes present on their tentacles and the body. Cnidoblasts are used for anchorage, defense and for the capture of prey.

→ These are having radial Symmetry.

→ These are aquatic.

→ These are acoelomates.

→ These are of cylindrical shape.

→ These are stationary.

→ Example : Obelia

Poly p (Asexually) → Medusa

Medusa (Sexually) → Poly p

→ Corals

→ Made up of CaCO3

→ Used in the formation of -

1). Marbles

2). Reef

3). Jewellery