The kidneys have their anterior and posterior surfaces. The foremost surface countenances towards the front stomach wall, while the back posterior surfaces confronting the posterior stomach wall. These surfaces are isolated by the edges of the kidney, which are the significant convexity horizontally, and minor concavity medially.

Anterior means: At or toward the front, forward, ventral: opposed to posterior.

anterior interventricular branch you're welcome!!!!

Posterior Interventricular Branch.