Cell and microorganisms

The document outlines the key discoveries in cell theory from 1665 to 1924. Some of the early discoveries include Hooke observing "cells" in cork in 1665, van Leeuwenhoek observing microorganisms in water, and Schleiden and Schwann establishing that cells are the fundamental unit of life in 1838-39. The timeline then provides more details on later discoveries such as Brown observing the cell nucleus in 1831 and developments that led to the acceptance of cell theory.