Cell Theory in Timeline
The Three Parts of the Cell Theory
Modern Cell Theory
Why is the Cell Theory Important
However, Schleiden’s theory of spontaneous cell formation was later disapproved by Rudolf Virchow in 1855. He instead stated, ‘Omnis cellula e cellula,’ meaning ‘All cells only arise from pre-existing cells.’ which is included as the third part of the cell theory. Thus, combining the contributions of Schleiden, Schwann, and Virchow, the traditional cell theory has three tenets. It states that:
Genetic material (DNA) is passed on from one cell to another during cell divisionAll cells have the same basic chemical compositionEnergy flow occurs within cells
The cell theory has transformed our understanding of biology by recognizing the cell as the fundamental unit of life. It continues to shape scientific progress in numerous fields.
