histotechnologist, an allied health professional who prepares tissue specimens of human and animal origin for a pathologist to examine for diagnostic, research, or teaching purposes. Histotechnologists perform all functions of the histological technician as well as identifying tissue structures, cell components, and their staining characteristics and relating them to physiological functions; implementing and testing new techniques and procedures; making judgments concerning the results of quality control measures; instituting proper procedures to maintain accuracy; and sometimes supervising and teaching. A 4-year baccalaureate degree program is usually required. See also histological technician.