The axillary fossa is classically known to most people as the armpit. Here, in this human anatomy video tutorial, you'll see how to dissect the axillary fossa, which in its technical definition is the hollow under the upper part of the arm below the shoulder joint, bounded by the pectoralis major, the latissimus dorsi, the anterior serratus muscles, and the humerus, and containing the axillary artery and vein, the infraclavicular part of the brachial plexus, lymph nodes and vessels, and...