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Hooke's Discovery
Around 1665 Robert Hooke an English scientist discovered honey- comb like structures while observing a cork slice through a microscope. The structures he saw were only cell walls which he saw because it was dead tissue but he created the term "cell" after seeing each individual cell making up the cork. -
Leeuwenhoek's Discovery
In 1683, while looking through a microscope at water particles from a pond, Anton can Leeuwenhoek discovered from what is known as the very first bacteria and protozoa. This was determined because he published a letter to the Royal Society about his discovery. This however does not contradict with Robert Hooke's discovery because whereas Hooke discovered the cell wall, Leeuwenhoek's discovery involved living organisms. -
Brown's Discovery
Around 1833, an English botanist known as Robert Brown discovered the nucleus in plant cells while viewing parts of plants under the microscope. This does not contradict with either Leeuwenhoek or Hooke's discoveries because each of the three scientists discovered new things that were connected but not a way that proved or disproved or improved upon each others' discoveries. -
Schleiden's Discovery
He said that plants were made of cells and that cells were the building blocks of plants. This is the first generalized statement about cells. Schleiden made the discovery by studying plant structure under a microscope. This improved the previous model by taking into account that plant cells do indeed have a cell nucleus like Brown suggested, but he said that there more to the cell than the cell nucleus. He discovered this in 1838. -
Schwann's Discovery
He discovered that both plants and animals are made up of cells and was the first to suggest that all living things are made of cells.
He discovered this by working in a lab with Schleiden analyzing both plant and animal tissue. This disproved the previous model/idea because the older model said that only plants were made of cells and that animals were made of something else. Schwann proved that all living things are made up of cells. He made the discovery in 1839. -
Virchow's Discovery
He discovered that all cells develop from only previously existing cells. He said that disease doesn't stem from organs but healthy cells. This improved on the previous model when Schwann had said that cells were created in a fluid called blastema and that imbalances in the body created blastema that diseased cells came from. He saw that other people had suggested that cells came from other cells and so he researched it further and proved them right. He made the discovery in 1855.
