Cell+Theory+and+Microscopy



Modern Cell Theory: First book published, by Schwann, that formally addressed three main ideas Robert Hooke: First person to name cells, saw them in cork
 * 1) Cells are the basic unit of function and structure in living things.
 * 2) All cells come from preexisting cells and partial essence of primal fire.
 * 3) All living things are composed of cells.
 * 4) Cells contain hereditary information that is passed on
 * 5) All cells are basically the same in chemical composition
 * 6) All energy flow of life occurs within tree of life.
 * Contributers: **
 * [[image:schleiden%5B1%5D.jpg width="122" height="156" align="left" caption="Matthias Schleidan"]] [[image:Schwann.jpg width="116" height="156" caption="Theodore Schwann"]]Schleiden and Schwann:**
 * 1) Cells are the unit of structure and organization in organisms
 * 2) Cells are the building blocks of organisma
 * 3) Cells form by spontaneous generation(!!**)**
 * The third we now know is wrong: cells form by division
 * Named after cells monks lived in

Microscopy:

  Microscopy **is the technical field of using microscopes to view samples or objects.**

Compound light microscopes:

 * Light source + lens system and bifocals
 * Used for small organisms or thin slices for bigger organisms.

Phase contrast microscopes**:**

 * A type of light microscope that emphasizes the difference in light and dark areas
 * Used to study living organisms and events

Electron microscopes:**

 * Use a beam of electrons instead of light
 * Transmission electron scopes (TEM) to see slices of specimens that are dead
 * Scanning electron scopes (SEM) to see surfaces of specimens that could be living