LOWER EXTREMITIES, BLOOD VESSELS AND NERVESArteries and Veins (22.9) arteriesaorta- inferior end splits in two- terminal bifurcation common iliac artery(22.17)- internal & external iliac a. femoral a.- hip joint to thigh is femoral medial femoral circumflex a.- wrap around femurlateral fem. circmfl. a.deep femoral a.popliteal a.- behind the knee posterior and anterior tibial a.- front and back of the tibia fibular a.,dorsalis pedis a.- front of the ankle leads to the dorsal arch posterior tibial- leads to the plantar arch veins (22.24) (22.20)arches- plantar arch sends blood to ant. & post. tibial veinanterior & posterior tibial veinsfibular v.popliteal v.- posteriorfemoral v.femoral circumflex v.external & internal iliac v.vena cavasuperficial leg veins:greater & lesser saphenous veins- lesser(lateral) joins with femoral vein greater (medial) joins with the femoral vein(bothbranch from the dorsal arch)Nervessignals: sensory-skin (tactile) and motor-muscles (command)Plexuses:(14.12)lumbar- lower vertebral column femoral(big)- motor: deep anterior hip and thigh(quadriceps) muscles sensory: skin of the anterior thigh and medial leg and foot obturator (small)- motor: medial compartment- thigh adductors sensory: medial thighsacral- comes out of the sacrum sciatic nerveLOWER EXTREMITIES, BLOOD VESSELS AND NERVES, pg. 2Sciatic Nerve- largest nerve in the body motor: hamstring muscles thigh musclessplits into common fibular n. and tibial n.common fibular n.locationmuscles- fibularis muscles and anterior leg muscles (toe extensors)skin- front of the leg and top of the foot deep, superficial branchestibial n.muscles- deep and superficial flexors of the leg and the plantar foot muscles skin- posterior leg and sole of the foot splits intomedial & lateral plantar