What We Will Cover in the Chapter

Last updated at June 22, 2026 by

This chapter takes us into the world of living things too small to see. We will learn what cells are, the tiny parts inside them, how cells build up a whole body, and the microbes that live all around us — some harmful, but most very useful.

Understanding the Name of the Chapter

Invisible Too small for our eyes to see — below about 0.1 mm.
Living World Cells and microbes that are alive, just very tiny.
Beyond Our Naked Eye We need a microscope to see them.

Topics We Will Study in This Chapter

2.1 Discovery of Cell 2.2 Cell — The Basic Unit of Life 2.3 Parts of a Cell 2.4 Variety in Cells 2.5 Cells, Tissues, Organs, Organ Systems and Organism 2.6 Microorganisms 2.7 Major Groups of Microorganisms 2.8 Microorganisms and Us
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CA Maninder Singh

CA Maninder Singh is a Chartered Accountant with 16+ years of practical experience and 20+ years of teaching experience. At Teachoo, he simplifies Accounts, Tax and GST with step-by-step examples so students can apply concepts confidently in exams and real life.

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