Front

Smallest membrane-enclosed unit in all living organisms.

Back

cell

Front

Single-celled organism performing all life processes.

Back

unicellular

Front

All organisms consist of cells; cells are the basic units of life, and new cells arise from existing ones.

Back

cell theory

Front

An organism made of many cells.

Back

multicellular

Front

Theory that microbes cause infectious diseases.

Back

Germ Theory of Disease

Front

Small cell compartment containing genetic info and directing activities; the cell's 'brain'.

Back

nucleus

Front

Microscopic cellular organism or virus.

Back

microbe

Front

Area visible through an optical instrument, like a microscope.

Back

field of view

Front

Cell structures with a membrane that perform specific functions.

Back

organelles

Front

Oxygen breaks down sugar, releasing carbon dioxide as waste.

Back

cellular respiration