Health is wealthCryogenic Freezing
Cryogenic freezing is the process of studying how materials behave at temperatures below about minus 238 degrees F. It is freezing at really low temperatures. It is often used for freezing at a cellular level. Cells or whole tissues can be frozen to a very low temperature, typically around the temperature of liquid nitrogen. This stops all biological processes, and if protecting techniques are used the cells or tissues can be preserved without damage. This is currently only achievable with small samples, or suspensions. Blood and small embryos are examples. It is also used in freeze drying of foods and other materials for long term storage. Physics scientists also use it to study what happens in space, since it is so cold in space too.
