Curriculum
Science — First Preparatory
Unit 1: Matter
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Unit 2: Forces
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Unit 3: Life
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Unit 4: Earth and Space
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Text lesson
Cells and Life
Cells and Life
The cell theory
The cell theory
- The cell is the unit of structure and function in a living organism.
- The scientist Hooke observed small empty spaces in a thin slice of cork under the microscope and called them cells.
- The cell theory rests on three points:
- All living organisms are made of one or more cells.
- The cell is the smallest unit that carries out the functions of life.
- Every new cell comes from an existing cell by division.
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