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pectoralis major axilla mammary gland supraclavicular branches infraclavicular branches brachial plexus axillary artery axillary lymph nodes axillary vein lymphatic drainage of axilla and breast clavipectoral fascia retromammary space pectoralis minor serratus anterior cubita fossa human anatomy mbbs students gross radial artery median nerve ulnar artery anterior interosseous nerve flexor muscles of forearm ulnar nerve cubital fossa.elbow joint proximal radioulnar joint brachialis coracobrachialis musculocutaneous nerve brachial artery radial nerve triceps brachii biceps brachii trapezius latissimus dorsi applied aspect of brachial plexus hip joint