*---I------*---I--------I----*--*-I A 16oo B 1700 1800 C D

1. *---I------*---I--------I----*--*-IA 16oo B 1700 1800 C D A The first microscope was invented B Hooke named the little boxes he saw under his microscope cells. C Schlieden studied plant parts under a microscope and Schwann concluded that all animals are made of cells. D Virchow proposed that cells come from cells that already exist.

2. Cell Theory • 1. All organisms are made up of one or more cells. • 2. Cells are the basic units of structure and function in all organisms. • 3. All cells come from cells that already exist.

3. Ch. 2 Section 2 • Simple microscope – uses light to magnify; uses one lens • Electron microscope – uses a magnetic field; magnifies up to one million times • Compound microscope – uses light to magnify; uses two lenses • Stereomicroscope – uses light to magnify; gives a three dimensional view • Antonie van Leeuwenhoek – mid 1600 made a simple microscope with a tiny glass bead • Robert Hooke – In 1665 viewed cork and named the little boxes he saw under his microscope cells • Matthias Schlieden- In 1830 used a microscope to study plants and concluded that all plants are made of cells • Theodore Schwann – Mid 1800’s concluded all animals are made up of cell • Rudolf Virchow –Late 1800’s hypothesized that cells divide to form new cells