The science of biology at low temperatures; research in cryobiology has made possible the freezing and storing of sperm and blood for later use.

the branch of biology that studies the effects of low temperatures on living tissues or organs or organisms

Cryobiology is the study of living organisms, organs, biological tissues or biological cells at low temperatures. This knowledge is practically applied in three fields: cryonics, cryopreservation and cryosurgery.