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1a Descending genicular artery. A. descendens genicularis. It arises in the adductor canal and penetrates the vasto-adductor membrane. A B

1b Saphenous branch. Ramus saphenus. It accompanies the saphenous nerve to the leg. A B

1c Articular branch. Ramus articularis. Anastomoses with branches running in the vastus medialis, then ends in the articular network of the knee. A

2 A. profunda fermoris. Larger, deeper and above all more lateral branch of the femoral artery. It crosses under the fermoral artery and gives off the branches listed below. A

3 Medial circumflex femoral artery. A cir-cumflexa femoris medialis. It passes medially and posteriorly between the iliopsoas and pec-tineus muscles. A

3 a Superficial branch. Ramus superficialis. It passes between the pectineus and adductor longus muscles. A

4 Deep branch. Ramus profundus. It runs below the lesser trochanter to the quadratus femoris, adductor magnus and ischiocrural muscles and anastomoses with the gluteal arteries. A

5 Ascending branch. Ramus ascendens. It courses in the adductor brevis, adductor magnus and obturator externus muscles and anastomoses with the obturator artery. A

6 Descending branch. Ramus descendens. It travels between the quadratus femoris and adductor magnus muscles to the ischiocrural musculature. A

7 Acetabular branch. Ramus acetabularis. It goes through the acetabular notch into the ligament of the head of the femur and anastomoses with the obturator artery. A

8 Lateral circumflex femoral artery. A. circum-flexa femoris lateralis. It passes laterally beneath the rectus femoris muscle. A

9 Ascending branch. Ramus ascendens. It ascends under the sartorius and rectus femoris and terminates underneath the tensor fasciae latae. It anastomoses with the medial circumflex femoral and gluteal arteries. A

10 Descending branch. Ramus descendens. It passes under the rectus femoris to the knee joint. A

11 Transverse branch. Ramus transversus. It penetrates the vastus lateralis and anastomoses with numerous vessels. A

12 Perforating branches. Aa. perforantes. Terminal branches of the profunda femoris artery that pass posteriorly close to the femur via slits in the adductor muscles and supply the long knee flexors. A

12 a Nutrient arteries of femur. Aa. nutrients (nutriciae) femoris. They arise from the first and third perforating arteries.

13 Popliteal artery. A. poplitea. It extends from the end of the adductor canal to the site where it divides at the lower margin of the popliteus muscle. B

14 Lateral superior genicular artery. A. superior lateralis genus. It passes anteriorly above the lateral femoral condyle and below the biceps tendon to join the articular network of the knee. A B

15 Medial superior genicular artery. A. superior medialis genus. It runs anteriorly below the tendon of the adductor magnus to join the articular network of the knee. B

16 Middle genicular artery. A. media genus. It runs directly forward to enter the knee joint posteriorly and supplies the cruciate ligaments and synovial folds. B

17 Sural arteries. Aa. surales. Branches for the calf musculature and the biceps tendon. B

18 Lateral inferior genicular artery. A. inferior lateralis genus. It passes under the lateral head of the gastrocnemius and under the lateral collateral ligament to join the articular network of the knee. A B

19 Medial inferior genicular artery. A. inferior medialis genus. It passes under the medial head of the gastrocnemius and the medial collateral ligament to join the articular network of the knee. A B

20 Articular network of the knee. Rete articular genus. Arterial plexus primarily on the anterior side of the knee joint. A

21 Patellar network. Rete patellare. Specific arterial plexus on the patella. A

22 Anterior tibial artery. A. tibialis anterior. It extends from its origin at the lower margin of the popliteus muscle to the lower margin of the inferior extensor retinaculum. After penetrating the interosseous membrane, it passes between the tibialis anterior and the extensor digitorum longus, then between the tibialis anterior and the extensor hallucis longus. A B C

23 Posterior tibial recurrent artery. [A. recurrens tibialis posterior]. An inconstant branch which passes under the popliteus to the knee joint. A B

24 Anterior tibial recurrent artery. A. recurrens tibialis anterior. It passes through the tibialis anterior to join the articular network of the knee. A B

25 Lateral anterior malleolar artery. A. malle-olaris anterior lateralis. It passes under the tendons ofthe extensor digitorum to join the lateral malleolar network. C

26 Medial anterior malleolar artery. A. malle-olaris anterior medialis. It passes under the tendon of the tibilais anterior to join the medial malleolar network. C

27 Laterial malleolar network. Rete malleolare laterale. Arterial plexus over the lateral malle-olus. C

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