We are known for inventing the compound optical microscope. it contributed to the theory for making it easier and practical while observing cells
ROBERT HOOKE'S OFFICE
Hmm... the organisms that I saw on the cork using the microscope, kinda looks like a cellula or small rooms in the monastery of monks.
AHA! I should named them CELLS! I'M A GENIUS! BWHAHAHA!
Those dental scraping looks like a moving tiny animals under the microscope. I will named them "Animalcules," since they look likes an animals.
Anton van Leeuwenhooke
I am a botanist who discovered the nucleus.
It helped to put together the cell theory, which states that all living organisms are composed of cells, and cell came from pre-existing cells. His discovery helped to confirmed the second half of the cell theory.