How were the cells discovered?

In the second half of the seventeenth century, a scientist from England, Robert Hooke, studying sections of a cork tree under a microscope, in order to understand the ability of the wood of this tree to stay on the surface of the water, discovered a large number of cells, which he compared with honeycombs of bees and gave the name to such a cell – a cell. Later, scientists became convinced that all living organisms have a cellular structure (with the exception of viruses).
In biology, there is a section that studies the structure and vital activity of cells – cytology.