Briefly describe the cell theory.

Explanation

**Step-by-Step Solution:**

1. **Introduction to Cell Theory**: The cell theory is a fundamental concept in biology that describes the properties and functions of cells.

2. **Founders of Cell Theory**: The cell theory was formulated by two scientists, Matthias Schleiden and Theodor Schwann, between the years 1838 and 1839.

3. **Original Postulates**: The original cell theory consisted of two main statements:
- All living organisms are composed of cells or the products of cells.
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