It gives a branch to the lacrimal sac before bifurcating into two branches: one branch anastomoses with the terminal (angular) part of the facial artery and is important for the blood supply of the face; the other travels along the dorsum of the nose to supply the outer surface of the nose, and forms anastomoses with its contralateral fellow, and with the lateral nasal branch of the facial artery.
The sac receives a branch from which two branches emerge: one connects with the terminal (angular) part of the facial artery and is essential for face blood supply; the other runs along the nose's dorsal side to provide blood to the outer surface of the nose, forming anastomoses with its opposite counterpart and the lateral nasal branch of the facial artery.