NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation in Animals
NCERT Solutions for Class 11 Biology Chapter 7 Structural Organisation in Animals covers animal tissues and a detailed morphological and anatomical study of an earthworm, cockroach, and frog as representative organisms.
Overview of Topics & Subtopics (Click to Jump)
1. Animal Tissues
Short Note:
• Four basic types of animal tissue: Epithelial tissue (covering/lining, protection), Connective tissue (binding and support, e.g. bone, blood, cartilage), Muscular tissue (movement; striated, unstriated, cardiac), and Nervous tissue (coordination, made of neurons).
2. Earthworm (Pheretima)
Short Note:
• A representative of phylum Annelida, characterised by metameric segmentation of the body, a closed circulatory system, and importance as a 'friend of farmers' due to soil-enriching activity.
3. Cockroach (Periplaneta)
Short Note:
• A representative of phylum Arthropoda, class Insecta, characterised by a body divided into head, thorax and abdomen, jointed appendages, and an open (haemocoelic) circulatory system.
4. Frog (Rana tigrina)
Short Note:
• A representative of phylum Chordata, class Amphibia; shows adaptations for a dual (aquatic and terrestrial) life, and undergoes metamorphosis from a tadpole (larval, aquatic) to an adult (terrestrial) form.
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