Technologies are represented by polymers (plastics) and metals which are used in making aids for taking, processing, transport and storing of blood as well as equipment used to ensure sterility of aids utilized when handling blood. Students also learn about polymers that support longterm storage of blood at very low temperatures by protecting cells from being damaged in the process of ice crystals growth. Also of some interest is the information about efforts of scientists to develop a blood substitute which could save life in emergency when there is no suitable donor available.