Which muscle borders the femoral artery medially?

The adductor longus is the muscle that borders the femoral artery medially. This muscle is part of the medial compartment of the thigh and plays a key role in adducting the thigh. The adductor longus is situated immediately next to the femoral triangle, which houses the femoral artery. Its position allows it to have a direct relationship with the arterial structure, creating a medial border.

By understanding the anatomical position of the adductor longus in relation to the femoral artery, it's clear why it serves as the medial border. The study of these relationships is crucial in anatomical education, particularly for recognizing how muscular structure can influence vascular pathways and vice versa.