axilla, gen. and pl. axillae

The space below the shoulder joint, bounded by the pectoralis major anteriorly, the latissimus dorsi posteriorly, the serratus anterior medially, and the humerus laterally; it has a superior opening between the clavicle, scapula, and first rib (cervicoaxillary canal), and an inferior opening covered by the axillary fascia; it contains the axillary artery and vein, the infraclavicular part of the brachial plexus, axillary lymph nodes and vessels, and areolar tissue. Syn: fossa axillaris [NA], armpit, axil, axillary cavity, axillary fossa, axillary space, maschale.



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