SIZE RANGE 



KIND OF CELL OR PARTICLE 

 AT STATED MAGNIFICATIONS 



ACTUAL DIMENSIONS 



MACROSCOPIC 

 (NAKED EYE) 



ABOVE 0.1 MILLIMETER 

 (mm) i.e. ABOVE 

 100 MICRONS (jli) 



EGG CELL (HEN) 



NUCLEUS 

 CYTOPLASM 



ACTUAL DIAM.= 3 CENTIMETERS 

 (cm) 



= 30 mm 



EGG CELL (FROG) 

 © 



ACTUAL DIAM. = 1,75 mm 



MICROSCOPIC 

 LIGHT MICROSCOPE) 



100 MICRONS (100/J.) 



DOWN TO ABOUT 

 0.1 MICRON (0.1m) 



AMOEBA 



xlOO 



RED BLOOD CELL 



xlOOO 



TYPHOID BACILLUS 



1 



x 10,000 



ACTUAL LENGTH AVERAGES 



ABOUT 250 MICRONS 



(0.25 mm) 



ACTUAL DIAM. = 7-8 

 MICRONS 



ACTUAL LENGTH = 2 

 MICRONS 



ULTRAMICROSCOPIC 

 (ELECTRON MICROSCOPE) 



BELOW 0.1 MICRON, DOWN 



TO 0.001m= 1 



MILLIMICRON (mfi) 



ONE OF THE SMALLEST BACTERIA 

 (BACTERIUM PNEUMOSINTES) 



x 100,000 



ACTUAL LENGTH =0.2m 



200 mp, 



INFLUENZA VIRUS 



x 100,000 



ACTUAL DIAM. = 60m,u 



Fig. 2-6. Relative sizes and size ranges of various cells and particles. The smallest unit used in biology is an 



Angstrom (A), which is equal to O.l millimicron. 



