NN+Death+By+Design

=Death By Design=
 * **Programmed Cell Death/Cell suicide**: a cell purposely killing itself. Cancer cells bypass PCD. continue to divide and make a tumor.
 * "The ultimate unit of life"- old person on screen
 * Leeuwenhoek- discovered cells in microscope. used onion cells, were shaped "monk cells" and called them cells
 * animal cells look more like "soap bubbles"
 * "can do everything animals can do"
 * animals: communities of cells
 * sheep walk across screen
 * have to work together
 * interactions make up an organism
 * everyone has a job in the organism
 * immensely complicated process to go from single cell organism to multi cell organism, takes a very long time
 * many complicated ways of communicating, they send signals for example
 * cancer cells ignore the signals sent
 * cells dont do anything unless signaled
 * divide! or dont divide!
 * to survive, need signals that tell it to, otherwise it kills itself
 * cells have to create other cells to die
 * cells starts PCD when told to die, and cancer cells just dont listen
 * neighboring cell eats dead cell, and then destroys "the evidence"
 * dont have webbed digits bc web cells told to die
 * 80-90% of embryo nerve cells die
 * humans have 10^13 cells
 * worms have 959 cells (not earthworms, more like miniworms)
 * why make a cell if you are going to tell it to die? (probably bc that cell had a purpose in an ancestor but not now)