HANS AND ZACHARIAS JANSSEN In 1590, these two gentlemen produced the first compound microscope by combining two convex lenses within a tube. ANTON VAN LEEUWENHOEK He improved magnification of microscopes by polishing lenses. Moreover in the 1680’s, he observed living cells through a microscope. He also discovered bacteria from a sample of saliva from his mouth

In 1838, he discovered that plants were made up of cells ROBERT HOOKE In 1665 an English scientist, Robert Hooke, discovered cells in a piece of cork, which he examined under his primitive microscope. Actually, Hooke only observed cell walls because cork cells are dead and without cytoplasmic contents. Hooke drew the cells he saw and also coined the word CELL.  MATTHIAS SCHLEIDEN In 1838, he discovered that plants were made up of cells

THEODOR SCHWANN In 1839, he discovered that animals were made up of cells RUDOLPH VIRCHOW In 1855, he stated that all living cells come from other living cells/things

Adapted from utahscience

From utahscience