Heart Neighbors

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Across
  1. 3. cluster of lymphoid tissue found cranioventral to the base of the heart; especially prominent in young individuals
  2. 4. cartilaginous, tubular structure of the lower respirator tract, conveys air to and from the lungs; cranial to base of heart and terminates dorsal to base at carina
  3. 6. muscular, tubular structure of the upper gastrointestinal tract, conveys ingesta from the mouth to stomach; cranial to heat, passes dorsally to heart before penetrating the diaphragm
  4. 8. longest nerve in the body, CN X, gives parasympathetic fibers to heart and lungs as it passes dorsal to heart; L recurrent laryngeal branch loops around ligamentum arteriosum
  5. 9. smaller R lung lobe that wraps dorsal to caudal vena cava to be grossly appreciated on the left
Down
  1. 1. sub-unit of lungs that are served by primary bronchi; occupy the L pleural cavity; separated by the mediastinum; divided into cranial and caudal lobes
  2. 2. musculotendinous structure that separates the thoracic and abdominal cavities; skeletal muscle innervated by the phrenic n.; primary muscle of respiration
  3. 5. sub-unit of lungs that are served by primary bronchi; occupy the R pleural cavity; separated by the mediastinum; divided into cranial and caudal lobes
  4. 7. large thoracic vein, found only on the right side; conveys oxygen poor blood from the internal thoracic structures back to the R atrium