Final answer:
The inguinal lymph nodes are situated in the upper femoral triangle of the thigh, below the umbilical region and above the popliteal region, playing a crucial role in filtering lymph from lower extremities and nearby areas.
Step-by-step explanation:
The inguinal lymph nodes are located in the upper femoral triangle of the thigh. This area is inferior to the umbilical region of the body but superior to the popliteal region.
Specifically, this area is below the waist and contains nodes that are important for filtering lymphatic fluid from the lower extremities, external genitalia, and the lower abdomen wall.