Blood bank technicians collect, label and prepare blood, plasma and other components for transfusions. Blood bank technicians properly store blood draws and maintain documentation and records. Technicians work with patients, making them comfortable during the procedure and monitoring vital signs.

Cytogenetic technologists analyze the structure of chromosomes found in various biological specimens and their relationship to a variety of diseases.

Cytotechnologists examine cells from other sites, including lymph nodes, bladder and lungs. Cytotechnology professionals often work with a pathologist to determine whether cells show signs of precancerous lesions, infections and other malignancies.

Histotechnologists and histologic technicians prepare body tissues to be examined by a pathologists. To prepare tissues for analysis, histotechnologists might section and stain tissues, embed them in paraffin or plastic and prepare frozen sections received from the operating room.

Medical laboratory technicians, also known as clinical laboratory technicians, analyze tissue, cells and bodily fluids in order to carry out tasks such as diagnosing disease and measuring medical drug levels.

Medical laboratory technologists prepare samples for analysis, monitoring testing procedures and analyzing results for infection or chemical composition.

Pathologists are physicians who diagnose presence and stage of diseases using laboratory techniques and patient specimens. They study the nature, cause, and development of diseases. They may also perform autopsies.

A phlebotomist is a health care professional who is trained to draw blood from a patient in a safe and sanitary manner. Phlebotomists may draw blood samples for tests or collect blood donations.