Used the word cell for the structures he observed when he examined a piece of cork under the microscope. was the first person to observe a living cell in a drop of pond water.

Robert Hooke used the word cell for the structures he observed when he examined a piece of cork under the microscope.

Anton Van Leeuwenhoek was the first person to observe a living cell in a drop of pond water.

Explanation:

Cells were first discovered by Robert Hooke who microscopically observed empty honeycomb-like structures in the piece of cork. Since these structures were actually "dead cells", they appeared empty to him and he called them "cells".

Anton Van Leeuwenhoek observed the living cell in a drop of pond water which was single-celled organisms.  

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