what theory states that everything is made of cells
The Cell Theory is one of the basic principles of biology. It states that all living things are composed of cells and cells are the basic units of life. The Cell Theory is one of the basic principles of biology. Credit for the formulation of this theory is given to German scientists Theodor Schwann, Matthias Schleiden, and Rudolph Virchow. The Cell Theory states: All living organisms are composed of cells.