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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.
How much calories in Dried fruits Dried fruits are exceptionally rich in calories and they supply significant amounts of minerals. Of the vitamins found in fruits, β-Carotene a
Endomyocardial biopsy helps in understanding that carditis can cause CCF in patients with rheumatic heart disease but frequency of diagnostic features on EMB is found only in 17 pe
Classification: There were many similarities between things or phenomena which led to their classification. The first classifications were in terms of beings (the living), th
Essential Features of Health Educator The health'educator should: be confident about the subject matter, be able to converse skillfully in the language which is un
Define Interaction of Vitamin D with other Nutrients? Vitamin D metabolism is inter-related with calcium, phosphorous, vitamin K and iron. Let us discuss each of these:
Explain Following Trems (a) State three structural features of prokaryotic cells. (b) Describe the functions in eukaryotic cells of lysosomes, ribosomes, and centrioles.
how the structure of ciliates facilitates their parasitism
How do the products of meiosis I differ from those of meiosis II? In meiosis I, the offspring cells are haploid but every cell contains two copies of the chromosome because th
Characters of pennetula
Q. What is the typical shape of a population growth curve? How can the biotic potential be represented in the same way graphically? A usual population growth curve number of in
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