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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.
What is meant by the arch reflex? In some situations the movement of the skeletal striated muscles does not depend upon commands of the superior motor neurons, i.e., it is not
CHORIONI C VILLUS SAMPLING (CVS) - CVS is done during 8th-10th week of pregnancy when abortion is safe. For CVS cells are sucked into a catheter passed through the cervix.
Explain the Analysis of food production? The agricultural sector is known for its diversity and heterogeneity of decisions right from the farm to the entire marketing system. A
Niacin affects all lipid parameters favorably. It is one of the only agents that reduces Lp (a) significantly (up to 30 per cent). Unfortunately, compliance is poor because of freq
Q. Besides the skin what are the other coverings of the body? Besides the skin there are other covering tissues made of epithelium over other tissue layers. They are the tissue
Origin and Delivery - Transport in Phloem We have stated above that transport of photosynthates starts from leaves and ends up in one or the other sink tissue. Though this is
Define the Concept of Public Nutrition? The rapidly changing global trends in the area of food consumption patterns, lifestyles and environment have a tremendous impact on the
Q. What are biopolymers? Ans. Polymers are macromolecules made by the union of several smaller identical molecules, called monomers. Biopolymers are polymers present in th
Proteins of Plant Origin - Nuts Nuts are excellent sources of proteins. Examples of nuts include cashew nuts, almond nuts , hazel nuts , coconuts, walnuts, brazil nuts ,cashew
WHAT IS THE FUNCTION OF CELL COAT
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