BIOLOGY - UNIT 3: CELLS

organ level

A degree of organism complexity. Organisms at this level have their cells arranged into organs.

system level

A degree of organism complexity. Organisms at this level have their cells arranged into systems.

tissue level

A degree of organism complexity. Organisms at this level have their cells arranged into tissues.

cellular level

A degree of organism complexity. Organisms in this level are either unicellular or colonial.

tissue

A group of cells working together to perform a particular task.

system

A group of organs working together for a common purpose.

organ

A group of tissues working together as a unit for a particular purpose in the body.

muscle fiber

A very long, contracting cell which makes up the muscles of our body.

colonial

Organisms that live in a group called a colony.

organism level

The highest level of complexity of a living thing in which the systems work together for the good of the whole. Any living thing must be considered to have reached this level.

specialization

The limiting of the function of a cell to a specific function.

division of labor

The work being divided up into specialized tasks as in a cell or a society.

differentiation

the maturation of a cell for a specific function