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Structural Organisation in Animals — Syllabus

CBSE · Class 11 · Biology

What Structural Organisation in Animals covers in CBSE Class 11 Biology: 4 topics, for the 2026-27 session. Part of the CBSE Class 11 Biology syllabus.

107 questions84 flashcards5 concepts

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4 Topics · CBSE Class 11 Biology · 2026-27

Topics in Structural Organisation in Animals

1

1. Levels of Organisation

  • Hydra is made of different types of cells and is used as a simple example before tissue organisation.
  • A tissue is a group of similar cells along with intercellular substances that performs a specific function.
  • All complex animals have four basic types of tissues.
2

2. Frog: General Features and Morphology

  • Frog belongs to class Amphibia of phylum Chordata.
  • Rana tigrina is the most common frog species in India.
  • Frog is cold blooded or poikilotherm.
3

3. Digestive System

  • Frog is a carnivore with a short alimentary canal.
  • Food is captured by the bilobed tongue.
  • The alimentary canal includes buccal cavity, oesophagus, stomach, intestine, rectum and cloaca.
4

4. Respiration

  • Frogs respire in water and on land by different methods.
  • In water, skin acts as an aquatic respiratory organ by diffusion; this is cutaneous respiration.
  • On land, buccal cavity, skin and lungs act as respiratory organs.

Key Concepts

Central concept: Organisation of cells into tissues, organs, and organ systems in animals, with frog as a model organism

Cellular organisationTissueOrganOrgan systemFrog as model animalMorphology of frogAnatomy of frogDigestive system

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Frequently Asked Questions

What are the important topics in Structural Organisation in Animals for CBSE Class 11 Biology?
Key topics in Structural Organisation in Animals include Levels of Organisation, Frog: General Features and Morphology, Digestive System, Respiration. Study these first, then practise questions on each for Class 11 exams.
How should I revise Structural Organisation in Animals for Class 11 exams?
Learn the core ideas first, then work through the 107 practice questions on Structural Organisation in Animals. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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