In human anatomy of the leg, the femoral sheath has three compartments. The lateral compartment contains the femoral artery, the intermediate compartment contains the femoral vein, and the medial and smallest compartment is called the femoral canal. The femoral canal contains efferent lymphatic vessels and a lymph node embedded in a small amount of areolar tissue. It is conical in shape and is about 2 cm long.
... The position of the femoral canal medially to the femoral vein is of physiologic importance ... The space of the canal allows for the expansion of the femoral vein when venous return from the lower limbs is increased or when increased intrabodominal pressure (valsalva maneuver) causes a temporary stasis in the ...
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