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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.
Issues Impacting Health and Development Poverty and malnutrition are the leading causes of high maternal and child mortality rates in developing countries. Together, they seri
The symptoms and signs of endocarditis are often constitutional and, when localized, often result from a complication of IE rather than reflect the intracardiac infection itself. C
Typical Form or Reparative Regeneration - Heteromorphosis Sometimes the part which grows back is not the same as that which was lost. The phenomenon is called Heteromorphosis.
Explain the gradient theoryof experimental embryology
male sex organ
what is hte structure of a live ina cow?
What is the type of genetic inheritance that determines the ABO blood group system? What are the relations of dominance among the involved alleles? The inheritance of the ABO b
Coagulation - Blood Collection : Plasma is used to minimize the time needed for coagulation so it is used is medical emergencies. There are many types of anticoagulants used
Which of the following E. coli can utilize lactose? Explain your answer. (-) superscript means mutation in the gene. Explain why the strain is able or unable to utilize la
Chromatin is made of DNA molecules associated to proteins known as histones.
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