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Subjects

Biology

Structural Organisation in Animals

जंतुओं में संरचनात्मक संगठन

This Class 11 Biology chapter explores how animal bodies are organised from cells into tissues, organs and organ systems. Students learn the structure and functions of epithelial, connective, muscular and nervous tissues, and understand how specialised tissues work together. The chapter also introduces the external features and internal organisation of representative animals such as the earthworm, cockroach and frog, helping students connect biological structure with functions like movement, digestion, circulation, respiration and reproduction.

1

Morphology and Anatomy of Earthworm

केंचुए की आकारिकी एवं शरीर रचना

This Class 11 Biology topic explores the morphology and anatomy of the earthworm within the chapter Structural Organisation in Animals. Students learn to identify its external features, including the elongated segmented body, setae and clitellum, and understand the organisation and functions of major internal systems such as the digestive, circulatory, respiratory, excretory, nervous and reproductive systems. The topic connects body structure with movement, feeding, circulation and reproduction.

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2

Animal tissues

जंतु ऊतक

This Class 11 Biology topic explores how cells are organised into animal tissues that perform specialised functions. As part of Structural Organisation in Animals, students learn the features, locations and roles of epithelial, connective, muscular and nervous tissues. The topic explains how epithelial tissue protects and lines body surfaces, connective tissue supports and connects organs, muscle tissue enables movement, and nervous tissue receives and transmits signals. It also introduces the main types and structural adaptations of these tissues.

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3

Cockroach

तिलचट्टा (कॉकरोच)

In Class 11 Biology, the study of the cockroach introduces students to the structural organisation of animals through the example of Periplaneta americana. It covers external morphology, body segmentation, appendages, the digestive, circulatory, respiratory, excretory and nervous systems, as well as reproduction and development. Students learn how organs are arranged and how systems function together in an invertebrate with an open circulatory system, tracheal respiration and Malpighian tubules.

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4

Frog

मेंढक

In Class 11 Biology, this topic introduces the frog as an example of structural organisation in animals. Students study its external features, body divisions, skin, and major organ systems, including digestion, circulation, respiration, excretion, nervous control, and reproduction. They connect the structure of each system with its function and explore how the frog’s adaptations support movement, feeding, breathing, reproduction, and survival in aquatic and terrestrial environments.

0 questions