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Chapter Analysis
Intermediate6 pages • EnglishQuick Summary
The chapter 'Structural Organisation in Animals' primarily focuses on the structure and functions of tissues and organs in animals. It introduces the basic types of tissues—epithelial, connective, muscular, and neural—and their organisation into organs and systems like the digestive, respiratory, reproductive, and circulatory systems using the frog as a representative organism. The morphology and anatomy of the common Indian bullfrog, Rana tigrina, are detailed, including adaptations to their environment like cutaneous respiration and reproductive strategies.
Key Topics
- •Types of animal tissues
- •Morphology and anatomy of frogs
- •Frog's organ systems
- •Respiration in frogs
- •Reproduction in frogs
- •Frog's circulatory and lymphatic systems
- •Nervous and endocrine systems in frogs
Learning Objectives
- ✓Understand the types and functions of tissues in animals.
- ✓Describe the morphology of the Indian bullfrog.
- ✓Explain the anatomical organization of frog's organ systems.
- ✓Understand respiratory adaptations in frogs.
- ✓Learn about reproductive strategies in amphibians.
- ✓Recognize the significance of frogs in ecological systems.
Questions in Chapter
Draw a neat diagram of digestive system of frog.
Page 88
Mention the function of the Ureters in frog.
Page 88
Additional Practice Questions
Explain the function of the lymphatic system in frogs.
mediumAnswer: The lymphatic system in frogs consists of lymph, lymph channels, and lymph nodes, and it helps in the transport of nutrients, gases, and water throughout the body, alongside the circulatory system.
Describe how frogs adapt to their environment with reference to their skin.
mediumAnswer: Frogs have smooth, slippery skin maintained by mucus to facilitate cutaneous respiration. They can also change color via mimicry to blend with their environment for protection.
What are the roles of the various respiratory structures in frogs?
hardAnswer: Frogs respire through their skin in water (cutaneous respiration) and through lungs when on land (pulmonary respiration). The buccal cavity also aids in lung ventilation.
Outline the evolutionary advantage of frogs' reproductive strategy.
mediumAnswer: Frogs lay a large number of eggs to increase the likelihood of offspring survival despite external fertilization and exposure to environmental threats during development.
Discuss the structural adaptation of the frog's hind limbs.
easyAnswer: Frog's hind limbs are muscular with webbed feet, adapted for swimming and leaping, enhancing their mobility both in water and on land.
NCERT Exemplar
AvailablePractice with NCERT Exemplar problems and solutions for this chapter. Exemplar problems are designed to help you master the concepts with advanced-level questions.
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