Cell Size and Scale this is a fantastic animation. Use the slider, and co from coffee bean to carbon atom with intermediate things to scale. It is meaningless to express in numbers. Like planetary distances. read more
Therefore, if you (with a size on the order of a meter) were the size of an E. coli bacterium, an atom would be about 0.1 millimeters, about the size of a grain of salt. If you were the size of an atom, the bacterium would be about 10 km long, or about 6 miles. read more
Depending on the species, the size varies. Most are visible with the naked eye (unlike atoms, viruses and bacteria). Fungi are eukaryotic organisms that include yeasts, molds and mushrooms. read more
Ward, W. S. and Coffey, D. S. (1991). DNA packaging and organization in mammalian spermatozoa: comparison with somatic cells. Biology of Reproduction 44, 569-574. read more