Perforating veins connect the superficial to the deep veins at a number of places in the leg.
Perforating veins were initially classified according to their level: lower third of the leg for low Cockett's perforators, middle third for medial gastrocnemius perforating veins and high Cockett's perforators, and finally, the upper third of the leg for Boyd's perforators.
In this video, I share a mnemonic on how to remember the names of these perforators.