Hans and Zacharias Janssen - Invented the first compound microscope
Antonie van Leevwenhoek - made a simple microscope; first to see movement of single-celled organisms
Robert Hooke - discovered box-like structures in cork, called them cells
Schleiden - said that all plants are made of cells
Schwann - said that all animals are made of cells
Virchow - said every cell comes from a cell that already existed
Cell - A membrane bound structure that is the basic unit of life
Cell Membrane - The lipid bilayer that forms the outer boundary of the cell; allows certain substances to
pass.
Cell Theory - This says that all living things are made of cells, that cells are the basic unit of structure and
function and that cells only come from other cells.
Cell wall - A rigid structure that surrounds the cells of plants
Chloroplast - A plastid containing chlorophyll, the site of photosynthesis
Cytoplasm - The region of the cell between the cell membrane and the nucleus
Cytoskeleton - A network of long protein strands in the cytosol that helps support all cells