Cellular Organization

• 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.

Unicellular & Multicellular Organisms

• 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.

Cell Functions

• Cells perform numerous functions and processes including
  • cellular respiration
  • waste breakdown and removal
  • growth and division
  • cellular transport

Passive Transport

• Osmosis is the passive transport of water molecules across a cell membrane.
• Diffusion is the passive transport of substances other than water across a cell membrane.
• Cell membranes are selectively permeable to various substances.
• Understand and diagram how materials move into and out of cells in the processes of osmosis, diffusion, and selective permeability