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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.
Define the Vitamin and Minerals required for elderly? Decreased gastric secretion and intestinal motility affect the absorption and intake of nutrients especially calcium, iron
Spinal cord The elongated part of CNS that runs downward in the spinal canal as continuationof medulla oblongata is called spinal cord. The functions of the Spinal Cord are
Pseudocoelom - Metazoa The platyhelminths which do not have a body cavity surrounding the gut, have a solid type of body constitution. The mesoderm completely fills the space
What are the attribute of amylase inhibitors? This has been attributed to a number of reasons, Let us see how these inhibitors act. The inhibitor forms a complex with amylase,
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Q. How to Investigate mitral stenosis by Electrocardiogram? Electrocardiographic changes are not specific for mitral stenosis and are never diagnostic for any valvular heart di
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Give the results of DistaE Dissection ? Results : For acute dissection of different parts of aorta, the mortality is reported as 9 to 33 per cent. In the International Regis
Why can mitochondria be considered the power plants of the aerobic cells? Ans) Mitochondria are the "power plants" of aerobic cells due to within them the final stages of the ce
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