Contributions to Cell theory

Zacharias Janssen created the first compound microscope with helped from his father Hans.

Robert Hooke then discovered empty, dead cork cells in tree bark.

Leeuwenhoek was the first to record and observe muscle fibres, bacteria, spermatozoa and blood flow in capillaries (small blood vessels).

Proposed cell theory that, , "All living things are composed of cells and cell products".

Matthias Schleiden stated that different part of the plant organisms are composed of cells.

Discovered that sperm and eggs are also cells.

Carl Heinrich Braun calls cells the basic unit of life.

Rudolph Virchow stated that all cells come from pre- existing cells. Then he also stated that not all plant cells are not made up of cells. Which eventually lead to the creation of cell theory.