مدرس المادة
The smallest living unit of organization in the body is the cell, because each cell is capable of performing any necessary functions without the aid of other cells (Figures 1 and 2, Table 1). Each cell has a cell membrane, cytoplasm, organelles, and inclusions. Thus, every cell is a world unto itself (like a small gated city) surrounded by a boundary, having “factories” and other “industries” that make it almost self-sufficient
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