Being the first person to use the word "cell."
Creating an electron microscope
Illustrating an animal cell.
Cells, the nucleus
Animals cells are the building blocks of life.
All living things are made up of cells.
All atoms are made up of cells.
Plants are the basic unit of life.
Cells are ALIVE.
Cells are the basic building blocks of life.
Sometimes single cells exist on their own and sometimes creatures are made up of millions of cells put together.
Atoms are living things.