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Cell Size and Scale

By |January 29, 2010|Education|

Cell Size

Use the slider at the Genetic Science Learning Center to view a stunning example of scale.

Some cells are visible to the unaided eye

The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny.

Smaller cells are easily visible under a light microscope. It’s even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts. Light microscopes use a system of lenses to magnify an image. The power of a light microscope is limited by the wavelength of visible light, which is about 500 nm. The most powerful light microscopes can resolve bacteria but not viruses.

The Inner Life of the Cell

By |May 4, 2009|Media, Video|

(Rocky Hill, CT) Harvard University selected XVIVO, LLC, a Connecticut based scientific animation company, to customize and develop an animation that would propel Harvard’s Molecular and Cellular Biology program to the next level of undergraduate education. XVIVO’s recently completed animation, titled “The Inner Life of the Cell”, has already won awards. The eight minute animation transports Harvard Biology students into a three-dimensional journey through the microscopic world of a cell.