robert hooke first discovered that cells look like little rooms
anton van leeuwenhoek
he observed living cells through a microscope by making his own
discovered plants are made of cells
discovered animals are made of cells
discovered living cells come from other cells
cell> tissue> organ> organ system> organism
For many centuries many people believed in the concept of spontaneous generation, the creation of life from organic matter. Francesco Redi disproved spontaneous generation for large organisms by showing that maggots arose from meat only when flies laid eggs in the meat.