Cells

• smallest unit of life

  cell
• outer covering of the cell

  regulates substances that are allowed to pass in and out of the cell

  cell membrane
• central portion of each cell

  directs the cell's activities and contains the chromosomes


  nucleus
• a substance that contains the material to instruct cells to perform different essential task, such as reproduction and movement.


  cytoplasm
• provide energy needed for body's task


  mitochondria
• manufactures protein

  ribosomes
• can break down substance, like bacteria


  lysosomes