Home

1994-2003
Quill Graphics

Contents.....
Cell Biology
Microbiology
Immunology
Microscopy

Interactive.....
Plant Cell
Animal Cell
Mitosis
Cell Cycle

Cell Cams

How Big?
Take a Quiz

Get.....
Stock Video
the CDROM
Clip Downloads
Animations

Galleries.....
Cell Gallery
Crystal Gallery

Study Tools.....
Index
Search
Translate
Homework
Links

Site Information.....
Permission
Privacy

About Us
Awards

Contact

 


 

This page is mirrored by permission from Jim Sullivan, creator of this page and the Cells Alive! web site.

How Big is a ... ?


This animation can be downloaded for classroom use.

 

The head of a pin is about 2mm in diameter. Use this animation to compare the relative sizes of cells and organisms. Nearly invisible without magnification, dust mites dwarf pollen grains and human cells. In turn, bacteria and viruses are even smaller.

How to use:

  • Use the left and right arrows to change magnification.
  • Click on the magnifications (1, 10, 100...) for a "Power of Ten" zoom.
  • Choose an individual cell or organism (right) to bring it into view.
  • Use the scale to measure individual cells.

     

    1 millimeter = 0.001 meter
    1 micron = 0.000001 meter
    1 nanometer = 0.000000001 meter


Keywords...

  • metric system
  • micron
  • angstrom
  • virus
  • bacteria

Biology Department


© Copyright 2004 Department of Biology, Davidson College, Davidson, NC 28035
Send comments, questions, and suggestions to: macampbell@davidson.edu