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Introduction To Cells Cells are the basic unit of… LIFE To see a cell, you must use a … . •Hans and Zacharias Janssen – invented the first compound microscope Common Microscopes • : – Can look at magnified objects using light • : – Can look at magnified objects in 3D using electron beams – Specimens must be covered in gold for image to be captured Occular Lens Arm Course Knob Objective Lens Stage Fine Light Source Knob Base Discovery of Living Cells • : – Cork Cells • Anton van Leeuwenhoek – Microorganisms in pond water The Cell Theory • All living things are made up of cells. • Cells are the basic unit of life. • All cells come from pre-existing cells. Two Types of Cells • . – No true nucleus – DNA is simply in a tangled mess all over the cell – Very few organelles – Older than Eukaryote • . – Nucleus – where DNA is kept – is bound inside a membrane – Many organelles Side By Side http://whyfiles.org/course/pp123/lesson_1/images/prokaryote(bacteria).jpg http://www.blobs.org/science/cells/eukaryote.gif Two Types of Eukaryotic Cells http://www.dyrevern.no/images/251/storfe_kuer_1.jpg http://jquery.com/demo/thickbox/images/plant4.jpg Plant vs. Animal Cells http://micro.magnet.fsu.edu/cells/plants/images/plantcell450.jpg http://www.uvm.edu/~inquiryb/webquest/fa06/mvogenbe/Animal-Cell.jpg Please Watch
