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Why did Robert Hooke use the term cell when studying cork?

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Artist's illustration of human nerve cells showing a central neuron with a green nucleus, branching dendrites, and glowing signals traveling along axons against a dark background. — cell Artist's conception of a human neuron.

In 1665, English physicist Robert Hooke published his famous work, Micrographia, in which he documented his microscopic observations of cork and other plant tissues.21

Hooke introduced the term "cell" to describe the microscopic, honeycomb-like cavities he observed in the cork. He chose this name because the cellulose walls of the dead cork tissue reminded him of the small, simple rooms—or "cells"—occupied by monks in a monastery.21