deep venous palmar arch deep venous palmar arch the deep palmar arch, an arterial network is accompanied by a pair of venae comitantes which constitute the deep venous palmar arch. it receives the veins corresponding to the branches of the arterial arch: the palmar metacarpal veins. deep venous palmar archpalm of left hand, showing position of skin creases and bones, and surface markings for the volar arches. (deep palmar venous arch not visible, but diagram shows location of corresponding artery.)detailssourcepalmar metacarpal veinsdrains toradial veinarterydeep palmar archidentifierslatinarcus venosus palmaris profundusta98a12.3.08.034ta24989fma22911anatomical terminology