Cell Size and Scale Bars

• What are the four steps to determine the size of a single cell?

  1. Clip a ruler on the microscope slide.
  2. Use an objective lens for x 100 magnification.
  3. Line up cells along 1 mm on the ruler.
  4. Divide 1000 µm by the number of cells.
• What is the unit of measurement used to express cell length in the procedure?

  Micrometers (µm)
• How do you calculate the length of a single cell?

  Divide 1000 µm by the number of cells
• What does the scale bar represent in the context of cell measurement?

  The length represented by the scale bar
• What is the formula for calculating actual cell length using a scale bar?

  Sampling = actual cell length / scale bar length