Anastomosis
（重定向自Anastomosing stream）
![Vein skeleton of a Hydrangea leaf showing anastomoses of veins](/Images/godic/202412/20/Vein_sceleton_hydrangea_ies5903.jpg")
![A network of blood vessels](/Images/godic/202412/20/Gray10835904.png")
An anastomosis (plural anastomoses, from Greek ἀναστόμωσις, communicating opening) is the reconnection of two streams that previously branched out, such as blood vessels or leaf veins. The term is used in medicine, biology, mycology, geology, geography and architecture.