Blood supply Department of Anatomy-Fudan University Perforating brs of int Internal thoracic artery Pectoral branch of thoracoacromial arter pectoralis major muscle thoracic a & 3d -7th Apical axillary nodes intercostal aa. & lat. brs Central axillary nodes Secretory lobules lat pectoral a Lateral thoracic artery Suspensory ligaments Nerve innervation: Lateralaxillarynodes Lactiferous ducts Pectoral axillary nodes Lat. ant cutaneous brs Lactiferous sinuses Retromammary space 2nd-6th intercostal n Axllary process supraclavicular nn Parasternal nodes Lymphatic and part of the breast into axilla ant pectoral n Vein drainage the breast parastemally Int thoracic v, axillary of the breast into the abdomen v, azygus v or hemiazygos v Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan UniversityCopy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Blood supply: Perforating brs of int. thoracic a & 3rd -7th intercostal aa.&. lat. brs of lat.pectoral a. Nerve innervation: Lat.& ant.cutaneous brs of 2nd - 6th intercostal n & supraclavicular nn & ant.pectoral n. Vein drainage: Int.thoracic v.,axillary v.,azygus v or hemiazygus v