The femoral vein is a major blood vessel located in the thigh. It is responsible for carrying deoxygenated blood from the lower limb back to the heart. The vein runs alongside the femoral artery, which carries oxygenated blood in the opposite direction. This vein is crucial for maintaining proper blood circulation in the legs. It collects blood from smaller veins in the thigh and connects to the external iliac vein, which eventually leads to the heart. Proper function of the femoral vein is important for overall vascular health and can be affected by conditions such as deep vein thrombosis.