Chordates are animals with backbones. Animal groups in the chordate phylum include fish, amphibians, reptiles, birds and mammals. Animals with backbones are the most highly evolved groups of animals, the most complex and complicated.
Femoral triangle. The femoral triangle (or Scarpa's triangle) is an anatomical region of the upper inner thigh. It is a subfascial space which appears as a triangular depression inferior to the inguinal ligament when the thigh is flexed, abducted and laterally rotated. Contents.
Femoral and obturator hernias may present as swellings in the medial thigh, as well as lymph nodes from the superficial inguinal group. Other possibilities to consider when observing a swelling in the medial thigh include a hematoma, or a soft tissue tumor like the intramuscular lipoma indicated above.