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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.
Various ways/techniques suggested for control of water pollution are as follows: 1. Pollutants (radio active, chemical, biological) present in water bodies can be removed by app
Q. Which are the heart chambers respectively where the entrance and the exit of blood occur? The heart chambers through which blood enters the heart are the atria there are the
Is dwarf pampas grass invasive? No. the root system is shallow and extends only as far as the plant is large. Though if the irrigation system is installed poorly and the pipes
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Mr. Smith is a 72 year male diagnosed with hypertension. Along with hypertension, Mr. Smith has been diagnosed with right-sided heart failure. The following are his list of medic
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What is Isonietric Exercise in dynamic auscultation ? Can be carried out by doing handgrip exercise which is sustained over 20-30 second. It results in transient increase in SV
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