cell theory

-is the historic scientific theory, now universally accepted, that living organisms are made up of cells

eukaryotic

-are organisms whose cells have a nucleus enclosed within membranes

prokaryotic

- a unicellular organism that lacks a membrane-bound nucleus

nucleus

-an organelle found in eukaryotic cells.

organelle

-any of the specialized structures within a cell that perform a specific function

cell wall

is a membrane of the cell that forms external to the cell membrane whose main role is to give cells rigidity, strength and protection against mechanical stress

vacuole

-is a fluid-filled pocket in the cell's cytoplasm that serves varying functions depending on the cell's requirements

endoplasmic reticulum

a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins