Regenerative medicine is a rapidly expanding field that focuses on repairing or replacing cells, tissues, or organs that have been damaged due to injury, disease, or aging. Some synonyms for regenerative medicine include tissue engineering, cell therapy, stem cell therapy, personalized medicine, and regenerative biology. Tissue engineering is the development of artificial tissues or organs using scaffolds and cells to mimic natural tissues. Cell therapy involves replacing or repairing damaged cells with healthy cells. Stem cell therapy involves using stem cells to differentiate into specific cell types to replace damaged tissues. Personalized medicine involves tailoring treatments based on a patient's individual genetic makeup. Regenerative biology explores the underlying mechanisms of tissue regeneration and repair.