FOR COMPARISON:

ITEM

MICRONS

ANGSTROMS

X VIRUS

hydrogen atom

0.0001

1

0.001

globular protein

0.004

40

0.04

large virus

0.1

1 x 104

1

E. coli bacteria

2

2 x 105

20

sperm w/o tail

1 x 5

1 x 105 by
5 x 105

10 x 50

human red blood cell

9

9 x 105

90

somatic cells

10-30

1-3 x 106

100-300

amoeba

90

9 x 106

900

sea urchin and human egg

100

1 x 107

1,000

frog egg

2000

2 x 108

20,000