![]() The right lymphatic duct drains into the junction of the right internal jugular and subclavian veins. These vessels then ascend to the cubital and axillary nodes before reaching the right lymphatic and thoracic ducts. The cephalic vein drains these blood vessels on the lateral side, while the basilic vein drains the medial aspect of the hand.ĭigital lymphatic vessels and the lymphatic plexus of the palm drain proximally to the forearm lymph vessels. Venous drainage in the hand is through the superficial and deep palmar arches on the palmar side, which anastomose with the dorsal venous network on the dorsal side. ![]() The tunica intima may also receive oxygen, nutrients, hormones, and other substances directly from the blood flowing in the blood vessel lumen. īlood supply to the arteries is provided by a capillary network called "vasa vasorum." Vasa vasorum originating luminally is called "vasa vasorum interna," and it supplies the tunica interna and inner portion of the tunica media. Vasa vasorum originating externally is called "vasa vasorum externa," and it supplies the adventitia and outer part of the tunica media. The dorsal carpal arch supplies the hand's dorsal aspect and is formed by the radial and ulnar arteries. The deep and superficial palmar arches form anastomoses via the metacarpal and common palmar digital arteries. The superficial palmar arch gives rise to the 3 common palmar digital arteries, which travel proximally. The deep palmar arch is more proximal in location than the superficial palmar arch. It gives rise to 3 palmar metacarpal arteries distally. The ulnar artery also has a deep branch that fuses with the deep palmar arch laterally.Īs their names suggest, the deep palmar arch supplies the deep palmar structures, while the superficial palmar arch provides circulation to superficial palmar structures. The ulnar artery travels on the medial side of the forearm before giving off several branches in the hand. One of its major branches is the superficial palmar arch. This arterial arch traverses deep to the palmar aponeurosis before running superficially to supply the long flexor tendons and distal thumb. The superficial branch of the radial artery connects with the superficial palmar arch medially. The deep palmar arch courses medially to fuse with the deep branch of the ulnar artery. It also gives rise to the deep palmar arch and a superficial branch. The radial artery travels laterally, dorsal to the scaphoid and trapezium, then divides into several branches in the hand. It supplies the thumb via the princeps pollicis artery and the radial aspect of the index finger via the radialis indicis artery. The radial and ulnar arteries form the hand's arterial anastomosis (see Image. Tunica adventitia (also called adventitia or tunica externa)-the outermost layer, serving as the arteries' protective covering.
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