By: Verenice Rodriguez

The Cell Theory

The Parts Of The Cell Theory

There are three parts to the cell theory. The three parts include:

1. All organisms are composed of one or more cells.

2. The cell is the most basic unit of structure, function, and organization in all organisms.

3. All cells arise from pre-existing, living cells.

Robert Hooke

In 1665, Robert Hook was the first person to ever discover the living cells. Through his very thin slices of bottle cork, he noticed there were little compartments, like those of a monk. Therefore, he named them cells, due to them looking like little monk cells.

Anton van Leeuwenhooke

In 1674, Anton van Leeuwenhoek was the first to witness living cells under a microscope. He described the algae as animalcules, meaning "little animals." While looking at the cells, it is likely he also saw bacteria too.