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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.
Q. If a person eats raw or badly cooked meat infected by Taenia solium or Taenia saginata will this person develop taeniasis or cysticercosis? If a person eats badly cooked or
Management of Canal Impediment a) Impediments are iatrogenic mishaps resulting from vigorous instrument short of the b) Appropriate working length and failure to confirm api
Classification of zoonoses More than 300 zoonoses of diverse etiologies are recognized. Thus, a very large number of zoonoses call for classification, especially for teaching
Q. Bird identity card. How are birds characterized according to examples of representing beings, basic morphology, respiration, skin, nitrogen waste, circulation,thermal control an
What are the five kingdoms into which living beings are divided? Which group of living being is out of this classification? The five kingdoms of living beings are the kingdom M
A L VEOL I - Sac like structure, unit of lungs. Increase surface area, exchange of gases occur in it. Rich in blood capillaries. Aloeoli join by pore of Kuhn to form a
What is Subphylum Crustacea and Subphylum Uniramia? The Arthropoda are usually grouped into four subgroupings called subphyla (singular-subphylum). One of these four subphyla -
Q. What are the secondary and the primary constrictions of a chromosome? And what is the other name given to the secondary constriction? Primary constriction is the narrower re
Define the Need for classification of Plants and Animals? First of all there is a need to know what classification is? Let us define in simple term. Classification is placing o
GENETICS 1. The branch genetics started in 1900 after rediscovery of Mendel's work. 2. Gregor Johann Mendel is called Father of genetics. 3. The t
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