Figure 2: Phase photomicrographs of cardiac outgrowth-derived cells from neonatal mice. A. High-magnification view showing the characteristic cell morphology with a broad cytoplasmic extension at one pole of the cell and a thin cytoplasmic process at the opposite pole. B. Gingko biloba leaf, to which the cell shape has been compared. C. Cells after 50 days in culture (arrow, elongated cell process; asterisks, cytoplasmic filaments apparently establishing intercellular contacts).