Structural Organisation in Animals Notes
The "Structural Organisation in Animals" chapter, typically found in Class 11 biology, explores how cells, tissues, organs, and organ systems are organized to form a complex animal body, focusing on the four main tissue types: epithelial, connective, muscular, and nervous . ORGAN AND ORGAN SYSTEM The basic tissues as you have learnt in earlier classes, organise to form organs which in turn associa to form organ systems in the multicellular organisms. Such an organisation is essential for more efficient and better coordinated activities of millions of cells constituting an organism. FROGS Frogs can live both on land and in freshwater and belong to class Amphibia of phylum Chordata. The most common species of frog found in India is Rana tigrina. Morphology Have you ever touched the skin of frog The skin is smooth and slippery due to the presence of mucus. The skin is always maintained in a moist condition. The colour of do...