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| Keywords: Gray4.png Formation of polar bodies in Asterias glacialis Slightly modified from Hertwig In I the polar spindle sp has advanced to the surface of the egg In II a small elevation pb1 is formed which receives half of the spindle In III the elevation is constricted off forming the first polar body pb1 and a second spindle is formed In IV is seen a second elevation which in V has been constricted off as the second polar body pb2 Out of the remainder of the spindle f pn in VI the female pronucleus is developed Other fields 1 Information field Ucfirst Plate 4 before 1858 Henry Gray Anatomy of the Human Body See Book section below 4 Creator Henry Vandyke Carter Book Gray's Anatomy PD-old-100-1923 Gray's Anatomy plates 0004 | ||||
