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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.
Why is it rare to find hemophilic women? There are less hemophilic women than hemophilic men because women need to have two X chromosomes affected to develop the disease while
Response to Heavy Metal Stress Several heavy metals emanating from industrial mining and sewage disposal operations contaminate the environment. Cadmium is a common contamina
What are the Sources of Vitamin K? As mentioned above, in plants, the only important molecular 'form of vitamin K is phylloquinone. Phylloquinone is distributed ubiquitously th
A question is flashed on a screen in the left visual world of right-handed person Z. Person Z is a healthy individual with an normal nervous system. Person Z has a patch over Z's
Q. Engler and Prantl's System of Classification? Adolf Engler, Professor of Botany, University of Berlin, Germany, proposed a phylogenetic system of classification in a book en
Food-borne zoonoses Food-borne illnesses are serious public health problem. They are associated with the ingestion of contaminated foods by microorganisms and their toxins, ma
Metabolic Process Location Within the study of biochemistry, what tends to obtain lost amidst the numerous pathways and enzymes is the fact which metabolism concerns the overal
What is meant by terminal electron acceptor? Give examples of e acceptors for aerobic and anaerobic respiration.
abnormal lung volumes and capacities
Q. Can you explain Likar System with Electrodes? The 12 lead Mason - Likar system with electrodes is used. The plastic adhesive electrodes has self contained electrode jelly in
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