Final answer:
The ST channel for the dorsum of the foot is linked to the anastomosis of the dorsalis pedis artery and the medial and lateral plantar arteries, which supply the distal foot and digits.
Step-by-step explanation:
The branch of the ST channel for the dorsum of the foot arises from the anastomosis of the dorsalis pedis artery and the medial and plantar arteries; these branches are responsible for supplying blood to the distal portions of the foot and digits. Specifically, the lateral plantar artery arises from the bifurcation of the posterior tibial arteries and supplies blood to the lateral plantar surfaces of the foot. Conversely, the medial plantar artery also arises from the bifurcation of the posterior tibial arteries but is tasked with supplying blood to the medial plantar surfaces of the foot.