Which nerve structures are identified in the femoral triangle from lateral to navel?

The correct answer highlights the arrangement of structures found in the femoral triangle, a key anatomical region in the thigh. From lateral to medial, the correct order is nerve, artery, vein, and lymph node, often remembered by the mnemonic "NAVEL."

The femoral nerve is the most lateral structure and is responsible for motor innervation to the anterior compartment of the thigh and sensory innervation to the skin over the anterior thigh and part of the medial leg. Following the nerve, the femoral artery runs medial to it. The femoral artery supplies blood to the lower limb and is a significant vessel in this region. Next is the femoral vein, which is situated medial to the artery, and it drains blood from the lower limb. Finally, the lymph nodes are located most medially within the triangle; these nodes play a vital role in the lymphatic drainage of the lower limb and pelvic region.

This anatomical order is essential for any clinical procedures or assessments performed in this area, such as catheterization, as knowing the precise structure layout can help avoid injury to these major vessels and nerves.