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Hooke
Hooke studied a slice of cork under a microscope and described what he saw as pores, which were later known as cells. Because he discovered the cell, Hooke disproved many earlier scientists on what the basic unit of life is. -
Leeuwenhoek
Leeuwenhoek was the first scientist to discover single-celled organisms such as bacteria. He also improved on the microscope which allowed him to view the cells better than Hooke. -
Dutrochet
Dutrochet was the first to observe light sensitivity, respiration, and geotropism in plants. He also became one of the first scientists to recognize the importance of cells for the organism to function. He came up with the idea that all living things are made of cells. -
Dujardin
Dujardin studied microscopic animal life. This led him to propose a new group of one-celled organisms called protozoans. He also was able to disprove the theory that microscopic organisms and higher animals have the same organs. -
Schleiden
Schleiden renamed the cell nucleus cytoblast and he also knew the nucleus was connected with the division of cells. He believed they erupted from the nuclear surface. He was also the first to recognize cells as the fundamental units of life. -
Schwann
Schwann discovered a digestive enzyme and also discovered that yeast were plant-like organisms. He recognized similiar plant structures like Schleiden. By including the animal world, Schwann disproved Schleiden's theory. Schwann believed that all cells come from other cells. -
Virchow
Virchow discovered that an organism getting sick is caused by a group of cells. Virchow agreed with Schwann in saying that all cells come from other cells. Virchow also studied cells from bones and connective tissue.
