A “Potential Anastomosis” seen in
Arterial anastomosis is the communication between the arteries, or branches of arteries. It may be actual or potential.

Actual Arterial Anastomosis: In actual arterial anastomosis the arteries meet end to end. For example, palmar arches, plantar arch, circle of Willis, intestinal arcades, labial branches of facial arteries.
Potential Arterial Anastomosis: In potential arterial anastomosis the communication takes place between the terminal arterioles. Such communications can dilate only gradually for collateral circulation. Therefore on sudden occlusion of a main artery, the anastomosis may fail to compensate the loss. The examples are seen in the coronary arteries and the cortical branches of cerebral arteries.
Labial branch of facial artery
Intercostal artery
Coronary artery
Arterial arcades of mesentery