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Structural Organisation in Animals (Frog) — Revision Notes

ICSE · Class 11 · Biology

Structural Organisation in Animals (Frog) revision notes for ICSE Class 11 Biology: 4 topics in quick points. Part of the ICSE Class 11 Biology syllabus.

90 questions40 flashcards5 concepts

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A dorsal view diagram of a frog, highlighting its body divisions (head, trunk), prominent eyes with nictitating membrane, tympanum, and webbed hindlimbs.
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Key Topics to Revise

1

1. Classification, Habitat and External Features

  • Rana tigrina belongs to Phylum Chordata, Subphylum Vertebrata, Superclass Tetrapoda, Class Amphibia, Order Anura, Genus Rana and Species tigrina.
  • Frogs are amphibious and cannot survive in brackish or salt water.
  • They are found in freshwater bodies such as ponds, lakes, ditches, pools and slow running streams, as well as in moist grassy land near water.
2

2. Feeding, Mouth and Alimentary Canal

  • Frogs are carnivorous and feed on insects, spiders, earthworms, snails, fishes and small frogs.
  • Prey is captured by the long, extensible and sticky tongue.
  • The tongue is posteriorly bifid and free, with its front end attached to the floor of the mouth.
3

3. Digestive Glands and Digestion

  • The liver is the largest digestive gland and is reddish brown.
  • It lies in the anterior part of the body cavity and has a large left lobe and a smaller right lobe.
  • The gall bladder lies between the liver lobes and stores bile.
4

4. Circulatory System and Heart

  • The blood vascular system of frog is closed type.
  • It includes heart, blood vessels and blood.
  • The heart is red, triangular and muscular, and lies in the anterior part of the body cavity at the level of the forelegs.

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Full Notes

Key Concepts

The frog discussed belongs to PhylumThe frog has a moderate bodyAdult frogs respire through moist skinThe digestive system includes mouthThe blood vascular system is closed

Frequently Asked Questions

What are the important topics in Structural Organisation in Animals (Frog) for ICSE Class 11 Biology?
Key topics in Structural Organisation in Animals (Frog) include Classification, Habitat and External Features, Feeding, Mouth and Alimentary Canal, Digestive Glands and Digestion, Circulatory System and Heart. Study these first, then practise questions on each for Class 11 exams.
How should I revise Structural Organisation in Animals (Frog) for Class 11 exams?
Learn the core ideas first, then work through the 90 practice questions on Structural Organisation in Animals (Frog). 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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