Cnidarla, Biology

Assignment Help:

Tlie phylum Cnidaria or Coelenterata, includes the faliiiliar hydras, jelly fishes, sea anemones and corals. You have olreacly studied about Cnidarialis in Units 4 and 7 of LSE-09 course. These are often brilliantly colourcd. They exhibit radial symnietry, The Cnidarians possess two basic metazoall structural features. Onc, there is an intenla1 space for digestion, called in Cnidarinns as gastrovascular cavity. This cavity lies along the polar axis of the animal atid opens to tlie outside at one end to for111 noutli, Tlie presence of a mouth a~id digestive cavity permits the use of a mucll greater rnlige of food sizes than is possible in tlie protozoarls and sponges. Two, in Clidariails a circle of tentacles, representing exte~lsiolls of the body wall, surrounds tlie ~lioiltli to aid in tlie capture and ingestion of food. Tlie Cnidarian body wall consists of three basic layers: an outer lnycr of cpidennis, nn inner layer of elidoder~nal cells lining Ilie gastrovnscilar cavity, and between these two a layer called mesoglea. The rnesoglea ranges from n tliin, non cellilar membranc to a thick, fibrous, jelly-like, coid lnaterial with or without wanderillg a~noebocytes, A considerable number of different cell types compose tlie epidermis and gastrader~nis, but there is only a limited degree of organ development.


Related Discussions:- Cnidarla

What is the destination of the branchial clefts in humans, Q. What is the d...

Q. What is the destination of the branchial clefts in humans? In humans the branchial clefts located in the anterior region of the pharynx also known as pharyngeal clefts are p

Ecosystem, ECOSYSTEM Plants, animals and human beings live in association...

ECOSYSTEM Plants, animals and human beings live in association with a wide variety of other plants and animals. These communities of organisms are not mere ad boc collections of

How to explain the high level of radiation resistance, Deinococcus radiodur...

Deinococcus radiodurans is a bacterium that was isolated from cooling ponds in and around nuclear power plants. It is highly resistant to ionizing radiation. Propose a hypothesis t

Explain fermented vegetable foods, Normal 0 false false fal...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Explain about ia muscle-spindle, Which of the following occur in response t...

Which of the following occur in response to an increase in the length of the right knee extensors in response to a quick tap applied to the right patellar tendon?  An increase in t

Different blood groups in man, Different blood groups in man 1.Blood Gr...

Different blood groups in man 1.Blood Group "A": Persons having this blood group will have antigen "A' on their red blood cells and antibody "B" in their plasma. 2. Blood Gr

Mammalian testis, Normal 0 false false false EN-IN X-...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What are the typical vegetation and the typical fauna, What are the typical...

What are the typical vegetation and the typical fauna of the tundra? The Tundra has vegetation formed mainly by lichens and mosses. In the fauna the densely furred animals, lik

Explain phylum zygomycetes, Phylum Zygomycetes 1) Asexual reproduction ...

Phylum Zygomycetes 1) Asexual reproduction by non-motile spores produced from a stalked spore case which is known as sporangium. 2) They reproduced by- conjugation between n

Explain the nonpolar molecular attractions, Explain the Nonpolar Molecula...

Explain the Nonpolar Molecular Attractions in basic chemistry? Nonpolar Molecular Attractions :  Van der Waals forces and hydrophobic interactions are weak (not as strong

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd