The Cell Theory and the Microscope Robert Hooke

The Cell Theory and the Microscope

• Robert Hooke (1665) first described cells after viewing a thin piece of cork through a primitive microscope. Hooke use the word “cell” to describe the honeycomb shapes that he saw. What he really saw were the cell walls that surround the once-living plant cells in the bark. They remind me of the time I was in jail….

Who’s your daddy? • Anton van Leeuwenhoek (1674) commonly known as the father of microbiology, used a simple microscope to observe living cells in blood and in water.

• Robert Brown (1820) used an improved microscope to examine plant and animal cells. He was first to describe the nucleus of a plant cell. WHAT THE HECK IS THAT? ?

• Theodor Schwann and Matthias Schleiden (mid 1800’s) later concluded that plants and animals were made up of cells. This information was used to develop the CELL THEORY. I’m cuter… No, I’M cuter… Oh, go to cells…

Four Parts of the Cell Theory

• All living cells are composed of one or more cells or products of cells.

Cells are the functional unit of life. • All basic chemical and physiological functions (repair, growth, movement, immunity, communication and digestion) are carried out inside of cells.

3. Cells are the structural unit of life. • The structure or form of the overall body of an organism is due to the structure and form of the cells of which it is composed.

All cells come from pre-existing cells. • Each cell contains genetic material that was duplicated and passed to a daughter cell.