Chapter 3: Cellular Form and Function

______- the scientific study of cells

The generalizations that constitute the cell theory are:

• All organisms are composed of cells & cell products.

• The cell is the simplest structural & functional unit of life

• An organism’s structure & all of its functions are ultimately due to the activities of cells.

• Cells come only from preexisting cells, not from non-living matter. All life, therefore, comes from the same original cells

• The cells of all species have many fundamental similarities in their chemical makeup and metabolic processes

______ – thin, flat, “squished” cells.

_______– as tall as they are wide (cubes).

_______– taller than they are wide (columns).

______ – irregular shapes with 4, 5, or 6 sides.

_______– starlike; nerve cells

_____- round

______- oval

________- – disc-shaped; red blood cells.