Cell - 1Just as the atom is the fundamental unit of matter, the cell is the fundamentalunit of living organisms. Each cell is unique, composed of carbohydrates, proteins,lipids, and other substances, organized into an orderly structural and functionalunit. We shall, in this chapter, see how the structure of cells and, in particular,the structure of cell components, facilitates the functioning of cells.History of the cellThe study of cells dates back more than three hundred years, coinciding with thedevelopment of microscopes. As scientists over the years learned more aboutcells, a group of common characteristics was developed which we call the CellTheory. Our use today of more sophisticated microscopes and research onbiochemical cell activities reinforces these premises.The Cell Theory1.Every living organism is made up of one or more cells.2.Cells are the structural and functional unit of living organisms. The smallest
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