A Re-introduction to Cells

The History of the Cell The Cell The basic unit of any organism Discovery made possible by the invention of the microscope

Microscopes and Cells 1600s Anton van Leeuwenhoek first described living cells as seen through a simple microscope.

Microscopes and Cells Robert Hooke used the first compound microscope to view thinly sliced cork cells. Compound scopes use a series of lenses to magnify in steps. Hooke was the first to use the term “cell”.

Microscopes and Cells 1830s Mathias Schleiden identified the first plant cells and concluded that all plants made of cells. Thomas Schwann made the same conclusion about animal cells.

The Cell Theory 1) All organisms are made up of one or more cells. 2) The cell is the basic unit of structure and function in all organisms. 3) All cells come from other cells.

Two Basic Cell Types Prokaryotic - Without a well-defined nucleus - No organelles except for ribosomes - Smaller

Two Basic Cell Types 2. Eukaryotic With a ‘true’ nucleus surrounded by a membrane With a full complement of organelles Larger

Life’s 6 Kingdoms Prokaryotic Eukaryotic All of the approximately 2 million different kinds of living things (species) on the Earth are classified into one of six kingdoms : Archaebacteria Eubacteria Protista Fungi Plants Animals Prokaryotic Eukaryotic

What cellular organelles do you remember? vacuoles nucleus mitochondria ribosomes cytoplasm nucleolus endoplasmic reticulum

Animal Cell

Plant Cell