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

Explain a prosthetic considerations, Prosthetic Considerations The comp...

Prosthetic Considerations The complete aesthetic diagnosis of the patient should be done prior to implant placement in the aesthetic zone. The smile line of the patient is crit

Seed dormancy - plant growth substances, Seed Dormancy - Plant Growth Subst...

Seed Dormancy - Plant Growth Substances Seed dormancy is critically important for the survival of plants. Factors involved in seed dormancy are: A. Environmental Factors

What is the importance of that structure in menstrual cycle, What is the st...

What is the structure into which the follicle is transformed after ovulation? What is the importance of that structure in the menstrual cycle? The follicle that released the ov

The fragility of erythrocytes, The fragility of erythrocytes The fragil...

The fragility of erythrocytes The fragility of erythrocytes is impaired in the absence of NADPH generation due to the deficiency of glucose-6-phosphate dehydrogenase thereby ca

What happens to the blood when it passes through the lungs, Q. Do the arter...

Q. Do the arteries that carry blood from the heart to the lungs contain arterial or venous blood? What happens to the blood when it passes through the lungs? Arteries of the pu

Argon, will argon tend to form bonds with other elements?

will argon tend to form bonds with other elements?

Explain the occurrence of nictoinic acid, Explain the Occurrence of Nictoin...

Explain the Occurrence of Nictoinic acid Nictoinic acid occurs widely in the animal and vegetable kingdom in free as well as in bound form (in enzymes). Several animal organs

Urea, #questionwhy is urea the major nitrogenous excretory product..

#questionwhy is urea the major nitrogenous excretory product..

Functions of golgi body, FUNCTIONS (1 )      Cell secretion - Golgi ...

FUNCTIONS (1 )      Cell secretion - Golgi body is concerned with secretion (export) of macromolecules. Secretion involves three steps:- (a) Golgi body receives the mat

Explain kingdom monera, Kingdom Monera The monerians are structurally t...

Kingdom Monera The monerians are structurally the simplest of all living things. They have apparently changed little since they first appeared on the earth. Their structure is

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