Life Is Cellular
Life Is Cellular
Learning Objectives State the cell theory. Describe how the different types of microscopes work. Distinguish between prokaryotes and eukaryotes.
The Discovery of the CellAnton van Leeuwenhoek was the first to observe living microorganisms.
The Cell Theory
• All living things are made up of cells.• Cells are the basic units of structure and function in
living things.
• New cells are produced from existing cells.
Exploring the Cell
Most microscopes use lenses to magnify the image of an object by focusing light or electrons.
Electron Microscopes
Two types of electron microscopes:
•transmission
•scanning
Electron Microscope
Micrographs
A micrograph is a photo of an object seen through a microscope.
Light Microscope Transmission Electron Microscope
Scanning Electron Microscope
Micrographs Review Scanning Electron MicroscopeLight MicroscopeTransmission Electron MicroscopeLight Microscope Using Fluorescent Stain
Cell Size
Certain units of measurement are used fortiny objects, such as cells.
Prokaryotes and Eukaryotes
Nucleus Nucleus
Cell MembraneCell Membrane
Cell MembraneIntracellular
Compartments Intracellular
Compartments
Review• All living things are made up of cells.• Cells are the basic units of structure and function in
living things.• New cells are produced from existing cells.