1-Only azygos No accessory 1 2 hemiazygos v 55 No hemiazygos v 5 3 2-int. thoracic a 3-left phrenic n 4-esophagus 5-post intercostal vv1-Only azygos No accessory hemiazygos v. No hemiazygos v. 2-int.thoracic a. 3-left phrenic n. 4-esophagus 5-post.intercostal vv. 1 2 3 4 5 5 5 5