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With the help of his father in 1595, he invented the compound microscope.
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While studying a silver cork under a microscope, he noticed it had “pores” surrounded by walls
Was actually looking at a dead plant cell
He named these pores “Cells”
Hooke calculated the number of cells in a cubic inch to be 1,259,712,000, -
Made microscopes with a single high-quality lens
Described spermatozoa for the first time
Studied many different type of organisms
Gave the first ever accurate description of red blood cells
Discovered bacteria and protozoa for the first time while studying teeth scraping -
Studied microscopy to dissect and accurately draw specimens reproductive organs
Franz discovered the nucleus for the first time and sketched it; though at the time he didn´t realize it´s significance or have name for it -
proposed animal tissues are formed from globules- (a small round particle of a substance)
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Henri Dutrochet was known for being the founder of cell biology. He discovered plant cells and in 1824, proposed animal cells and plant cells have similar structures
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When observing pollen fertilizing, he noticed it moving in and out of ovals in the cell
named the oval the Nucleus and realized it was vital for fertilization & embryonic development -
Purkinje determined the word protoplasm as the fluid substance of a cell
Also observed plasma in blood cells
Noticed cells were the structure of animal and plants -
Thought plant growth happen because of new cells forming
In 1838, Declared cells as the basic building block of life
Determined that plant tissues are made of cells and that an embryonic plant arose from a single cell -
Assisted Schleiden about tissues being composed of cells
in 1839, Determined the Cell Theory
Described cell structure in animal cartilage -
In 1844, Had a plan to experiment with cell division
Strained or hardened the cell membrane with Copper Sulfate, Vinegar, and alcohol
Found cell division in animal cells
Theorized that cell division is the reason pathological tissue spreads -
Between 1844 and 1855, Raspail was the first to propose that that all cells are derived from other cells
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Virchow added the third part to the cell theory: cells develop from preexisting cells (proved Raspail´s idea)
First to show the theory applies to all cells not just healthy ones
