Tension at the surface of the dividing sea-urchin egg.
D000818:Animals; D002455:Cell Division; D003201:Computers; D005260:Female; D005306:Fertilization; D008433:Mathematics; D010063:Ovum / Q000166:cytology; D011312:Pressure; D012617:Sea Urchins / Q000166:cytology; D013500:Surface Tension; D013696:Temperature; D013997:Time Factors