In freezing large tissues and organs for future use, scientists have been working on a method called cryopreservation. They looked into freezing and preserving big tissues and organs for potential medical applications. By studying how freezing affects these large body parts, researchers have found that factors like the amount of tissue being frozen, how heat is transferred, and the chemicals used in the process all play a role in the success of this technique. They've also explored two main freezing methods, directional freezing and vitrification, to see how they impact the preservation of large tissues and organs. Essentially, the way these freezing methods are applied can affect the outcomes of preserving entire organs for future medical purposes.