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Animal Organisation
Animal Organisation - Animals exhibit a complex body organisation which shows a very clear evolutionary trend. The complexity of animal organisation is seen with reference to features like cellularity, germ layers in the body wall, symmetr..
Animal Organisation
Animals exhibit a complex body organisation which shows a very clear evolutionary trend. The complexity of animal organisation is seen with reference to features like cellularity, germ layers in the body wall, symmetry of the body parts and the nature o..
Animal Kingdom
The Animal Kingdom is divided in several phyla mainly on the basis of the cell organisation, symmetry, presence or absence of notochord and body cavity. Animals are arranged progressively from simple single-celled protozoans to highly complex mammal..
Animal Classification
Animal Classification - The animal kingdom is classified into distinct groups based on the body organisation discussed above. The following scheme provides an outline classification of the animal kingdom into the ten major phyla: fig. 10.3 -Phylogenetic Tree ..
Animal Classification - The animal kingdom is classified into distinct groups based on the body organisation discussed above. The following scheme provides an outline classification of the animal kingdom into the ten major phyla: fig. 10.3 -Phylogenetic Tree ..Animal Morphology Introduction
Introduction - Animals can be broadly distinguished into two major groups the nonchordates (or invertebrates) and the chordates.Invertebrates account for more than 95% of the animal species that have been identified. These are animals which do not have a vertebral colu..
Introduction - Animals can be broadly distinguished into two major groups the nonchordates (or invertebrates) and the chordates.Invertebrates account for more than 95% of the animal species that have been identified. These are animals which do not have a vertebral colu..Table 1: Nutritional values of animal products
(milch) animals like cows, buffaloes and goats. Eggs are obtained from egg laying birds like fowl and duck. Meat is obtained from fowl, cow, sheep, goat and pig. Fish are either fresh water or marine and include crabs, shrimps and prawns. To meet the ever-increasing demand of food to feed..
Parazoa
: In this group cells do not form tissues. Hence, animals have remained at the acellular grade or organisation. For example, Sponges..
Phylum Porifera
Primitive multicellular animals with cellular grade of organisation. Free living aquatic, mostly marine, sedentary forms either solitary or colonia..
Phylum Platyhelminthes
Bilaterally symmetrical, triploblastic true multi-cellular animals with organ grade of organisation. Free living (aquatic or terrestrial) or parasitic (ecto- or endoparasites..
Cellularity
One of the main characteristics used in defining grades of animal complexity is the presence or absence of tissues. Tissues are the aggregations of embryologically and morphologically similar cells that become arranged to perform specific functions. The protozoans occur as single cells or..
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