What is the characteritics of coelenterates?

Characteristics. All coelenterates are aquatic, mostly marine. The bodyform is radially symmetrical, diploblastic and does not have a coelom. The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.

1. Which structure is characteristic of all coelenterates?
2. What are the characteristics of porifera and Coelenterata?
3. What is the meaning of Coelenterata?
4. What are tentacles in Coelenterates?
5. What is Coelenterata called Cnidaria?
6. What is the importance of Coelenterates?
7. What type of digestion is Coelenterates?

Which structure is characteristic of all coelenterates?

Usually known to be the simplest of all animals groups, Coelenterates have true tissues and the gastrovascular cavity, which is the characteristic coelenteron.

What are the characteristics of porifera and Coelenterata?

Porifera: They exhibit a cellular level organization. Coelenterata: They exhibit a tissue level organization. Porifera: The characteristic canal system circulate water, food and oxygen throughout the body. Coelenterata: The circulation of water, food and oxygen is occurred through the coelenteron.

What is the meaning of Coelenterata?

coelenterate. / (sɪˈlɛntəˌreɪt, -rɪt) / noun. any invertebrate of the phylum Cnidaria (formerly Coelenterata), having a saclike body with a single opening (mouth), which occurs in polyp and medusa forms. Coelenterates include the hydra, jellyfishes, sea anemones, and corals.

What are tentacles in Coelenterates?

Tentacles have special structures known as the nematocysts which help in capturing and paralyzing prey. Coelenterates simply wave their tentacles and when a prey comes in contact, the nematocysts inject the toxin that paralyses or kills the prey. Nematocysts are the most distinguishing feature of this phylum.

What is Coelenterata called Cnidaria?

Phylum Coelenterata is also known as Cnidaria due to the presence of cnidoblasts or cnidocytes on the tentacles and body surface. They contain stinging capsules called nematocysts.

What is the importance of Coelenterates?

Coelenterates as a whole are of little economic importance. Seldom used as food by man, they are eagerly devoured by certain fishes and by invertebrates such as the crownof thorns starfish. Certain corals used as ornaments and for the manufacture of jewelry have become rare because of exploitation.

What type of digestion is Coelenterates?

Coelenterates possess a simple gastric cavity, where they digest their food.