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Hans and Zacharias Janssen
Hans and Zacharias janssen made the first compound by combining two convex lenses inside a tube. Zacharias Janssen is the son of Hans Janssen. -
Robert Hooke
in 1665 Robert Hooke studied thin slices of dead cork under a microscope. Hooke named cells after the rooms in the monastery, because he said they looked like the walls in the rooms known as "cells".I have discovered that cells are the basic unit of life. Hooke introduced cells to the world of science. -
Francesco Redi
Tested the hypothesis of spontaneous generation with flies on meat and disproved it. -
Anton Van Leeuwenhoek
in 1674, Leeuwenhoek improved the use of the microscope. in order to clarify the view and magnification, Leeuwenhoek polished the lenses in the microscope. Leeuwenhoek was 16 years old when he first studied with a microscope as an intern for a cloth merchant. -
Henri Dutrochet
Was a french physician botanist and physiologist he is best known for his investigation into osmosis. -
Robert Brown
Robert Brown, an English botanist, discovered the nucleus in plant cells. Matthias Jakob Schleiden, a German botanist, proposes that all plant tissues are composed of cells, and that cells are the basic building blocks of all plants. This statement was the first generalized statement about cells. -
Matthias Schleiden
Matthias Schleiden was the first scientist to contribute to cell theory. he was a German botanist. Schleiden discovered that all plants are made up of cells. He also recognized the importance of the nucleus in cells. -
The Cell Theory
Three parts - 1. All organisms are made up of one or more cells. 2 Cells are the basic unit of life.
3. All cells arise from pre-existing cells -
Theodor schwann
in 1839, one year after Schleiden discovered that all plants are made up of cells, Theodor Schwann discovered that all animals are made up of cells. This is the second person to contributed to the cell theory. Schwann was a German zoologist. He was also the first person to use the term metabolism. Schwann studied digestion in animals. -
Rudolph Virchow
In 1855, Virchow developed the third and final part of the cell theory. He stated that all living things come from other living things. Virchow was the first to witness a cell divide. He also analysed the effects of diseases in organs in tissues in the body. -
Louis Pasteur
set out to disprove spontaneous generation with a now-classic experiment that both firmly established the cell theory beyond doubt and solidified the basic steps of the modern scientific method.
