Structural Organisation in Animals
Cells group into tissues, tissues into organs, and organs into working systems. This chapter in NCERT Class 11 Biology, Chapter 7, describes epithelial, connective, muscular and nervous tissues and then studies the earthworm, cockroach and frog as examples of organisation. It links body plans to habitat and function, from burrowing to flying and hopping. You will learn to identify tissues under the microscope and compare how digestion, circulation, respiration and reproduction are arranged in these animals.
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