Cell theory
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In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all
Human cancer cells with nuclei (specifically the DNA) stained blue. The central and rightmost cell are in interphase, so the entire nuclei are labeled. The cell on the left is going through mitosis and its DNA has condensed.
Matthias Jakob Schleiden (1804–1881)
Theodor Schwann (1810–1882)
Tree of life by Haeckel
Cell biology
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Cell biology, cellular biology, or cytology, is the branch of biology that studies the structure, function, and behavior of the cells. All organisms are made of cells. A cell is the basic unit of life
Cell theory
…became advanced enough to discover cells. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, known as cell biology. When observing a piece of cork under the scope, he was able to see pores. This was shocking at the time as it was believed no one else had seen these…
Anthonie van Leeuwenhoek, pioneer of cell microscopy
Yoshinori Ohsumi, Nobel Prize winner for work on autophagy