Fallopian tube, coloured transmission electron micrograph (TEM). Section through columnar epithelium from a fallopian tube during the secretory phase of the endometrial cycle when the ciliated cells are lacking. Large prominent nuclei are present (red) with microvilli visible at the cell surface (top). A mitotic cell is seen center. Connective tissue is seen at the bottom right of the image. Magnification: x1000 when printed at 10 centimetres wide.