parabiosis

Parabiosis is a scientific procedure where two living organisms are surgically joined to share a common circulatory system, allowing blood and other fluids to flow between them. This technique enables researchers to study how circulating factors in blood influence aging, disease, and tissue regeneration. It has been used primarily in animal studies, such as connecting the circulatory systems of young and older mice, to investigate whether factors in young blood can promote healing or delay aging processes in older organisms.