A blood smear, as seen via a microscope. The round cells with no nuclei are red blood cells. The slightly larger cells with nuclei are white blood cells, including a necrophil on the left and a lymphocyte on the right. The small structures are platelets. Samples of tissue placed into plastic “cassettes” for processing An example of the appearance of a cytology slide (breast cancer) viewed under the microscope Postmortem examination of the teeth of a badly burned body in order to assist in the positive identification of the decedent. Note that the soft tissues of the face (lips and cheeks) have been cut away in order to maximize the visibility of the teeth A hair present on the fingers of a homicide victim.