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1. Lymphatic trunks
   1. Thoracic duct (drains nodes of the right and left lower extremities, pelvis, abdomen, left thorax, left upper extremity, and left head and neck)
   2. Right lymphatic duct( drains nodes of the right thorax, right upper extremity, and right head and neck)
2. Lymph nodes
   1. Breast
      1. Parasternal (internal thoracic or internal mammary)
         function - drain medial breast bilaterally
      2. Inguinal
         function - may drain inferior breast
      3. Infraclavicular
         function - may drain superior breast
      4. Axillary
         function - predominant drainage of the breast
      5. Apical axillary
         function - drain superior breast and other axillary nodes
   2. Thoracic
      1. Parietal (L. paries, wall)
         1. Parasternal
            function - drain medial aspect of breast, upper abdominal wall, anterior pleura & part of liver
         2. Intercostal
            function - drain lateral & posterior thoracic wall
         3. Diaphragmatic
            function - drain liver, pleura & diaphragm
         4. Posterior mediastinal (L. middle septum)
            function - drain pleura & esophagus
      2. Visceral
         1. Pulmonary
            function - drain lung
         2. Bronchopulmonary
            function - drain pulmonary nodes & bronchi
         3. Tracheobronchial (inferior & superior)
            function - drain bronchopulmonary & posterior mediastinal nodes, trachea & heart
         4. Paratracheal
            function - drain tracheobronchial nodes
   3. Abdominal and Pelvic
      1. Preaortic
         function - drain abdominal viscera supplied by the celiac, superior mesenteric and inferior mesenteric arteries
      2. Lateral aortic (para-aortic)
         function - drain the kidneys, suprarenal glands, ureter, posterior abdominal wall, testes, ovaries, uterine tubes, superior uterus & iliac nodes
         1. Common iliac
            function - drain internal and external iliac nodes
         2. External iliac
            function - drain inguinal nodes, abdominal wall, perineum and lower pelvic viscera
         3. Internal iliac
            function - drain pelvic viscera, perineum and gluteal region (skin drains to inguinal nodes)
      3. Retroaortic
         function - drain the posterior abdominal wall

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