3 : 2/ Mechanical Resonances of Biological Cells 



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(a) Sphere, 

 of 9 and i/r. 



Illustrates definition 



(c) Polar cross section (ijj = 7r/4 

 and 57r/4). Shows distortion as a 

 function of 9 in P\ mode. 



(e) Equatorial plane for mode 

 characterized by m = 6. 



(b) Equatorial cross section 



(9 = 7r/2). Shows distortion as a 



function of i/j in any mode Pfn- 



(d) Fluid motion. Shown for 

 equatorial cross section (9 = 7t/2) 

 for a P|n mode. Motion shown 

 for | cycle only. 



(f) Polar plane for mode charac- 

 terized by n — m = 4. A three- 

 dimensional combination of E 

 and F illustrates Pi . 



Figure 2. Various modes of oscillation for interfacial-tension 

 model. Liquid flow lines assume irrotational flow. The 

 symbols are explained in the text. Similar modes character- 

 ized by P™ for bubbles are easily observed for n greater than 8. 

 The number of nodal diameters in the equatorial plane 

 (9 = 7r/2) is characterized by m. The number of "0" nodal 

 circles is given by n — m. 



