Standard LS.3
Cellular Organization - Cells, Tissues, Organs, Organ Systems

Standard LS.3
The student will investigate and understand that living things show patterns of cellular organization. Key concepts include
a) cells, tissues, organs, and systems; and
b) life functions and processes of cells, tissues, organs, and systems (respiration, removal of wastes, growth, reproduction, digestion, and cellular transport).


Unicellular organisms are made of only one cell. Multicellular organisms are made of many cells.

Multicellular organisms exhibit a hierarchy of cellular organization. They are complex in that there is a division of labor among the levels of this hierarchy for carrying out necessary life processes.
Cells perform numerous functions and processes, including respiration, waste removal, growth, irritability, and reproduction.

Cells that have the same function group together to form tissues. Tissues that have the same function group together to form organs. Organs with similar functions group to work together in an organ system.
differentiate between unicellular organisms and multicellular organisms and name common examples of each.

compare and contrast how unicellular and multicellular organisms perform various life functions. This includes the application of knowledge about systems in organisms.

compare and contrast the various basic life functions of an organism, including  respiration, waste removal,
growth, irritability, and reproduction, and explain the role that each life function serves for an organism.

model how materials move into and out of cells in the processes of osmosis, diffusion, and active transport.

differentiate among cells, tissue, organs, and organs systems.