The Fundamental Unit of Life explains that the cell is the basic structural and functional unit of all living organisms. Every living thing, whether a plant or an animal, is made up of cells. Cells carry out all the essential life processes such as respiration, growth, reproduction, and response to stimuli. The cell contains different parts called cell organelles, each performing specific functions. Important parts of a cell include the cell membrane, cytoplasm, and nucleus. Cells may be prokaryotic (without a true nucleus) or eukaryotic (with a true nucleus). Understanding cells helps us know how living organisms function, grow, and survive.
Key Points
- The cell is the fundamental (basic) unit of life.
- All living organisms are made up of one or more cells.
- The cell membrane protects the cell and controls the movement of substances in and out of the cell.
- The cytoplasm contains cell organelles that perform different functions.
- The nucleus controls the activities of the cell and contains genetic material (DNA).
- Cells can be prokaryotic or eukaryotic.
- Cells perform all essential life processes in living organisms.
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