Figure 2: Teratoma growth in subcutaneous tissue of nude mice and histological characterization of a teratoma formed from undifferentiated mouse ESCs. (A) The teratoma mass formed in the subcutaneous region of a nude mouse, (B) Glandular epithelium (endoderm), (C) guts epithelium (endoderm), (D) adipocyte (mesoderm) tissue, (E) Cartilage (mesoderm) tissue, (F) an osteoid like (mesoderm) tissue, (G) smooth muscle cell (mesoderm), (H) striated muscle tissue (mesoderm) and (I) neural epithelium (ectoderm).