Cells 
Cell theory
Size of Cells
Unicellular and Multicellular
Functions of a celll 
What are Cells? 
Basic Units of Stucture
and function in living things
Multicellular 
Unicellular 
Made up of two or more cells
function similarly in all organsisms
German scientists studied cells 
Found out plants & animals --> made of cells
all the life functions of an organism occur within cells
all cells come from preexisting cells. 
all organisms are made up of one or more cells 
Only one cell
cells in digestive systems 
absorb food
carry out basic processes of life
very small
measured in micrometers
7 micrometers across
Human skin cells
one square cm of your skin's surface 
Red Blood Cells
7 micrometers across
100,000 cells
only visible through microscope 
i.e amoeba
Cells By 201, 226, 214, and 205
involved in functions of organisms
getting rid of wastes
obtaining oxygen
obtaining food
growing
Modern Cell theory rules
all cells are the same in chemical composition in organisms of similar species.
the activity of an organism depends on the activity of independent cells
cells contain DNA which is passed from cell to cell during cell division 
I.e, dogs, cats, rabbits, etc.