True about internal thoracic artery is-: (A) Arises from 1st part of subclavian artery, (B) Pericardiophrenic is a terminal branch, (C) Divides in the 4th intercostal space, (D) Descends at posterior end of intercostal space
Answer is A. Ans. is 'a'i.e., Arises from 1st part of subclavion artery Internal thoracic arteryo It arises from 1st part of subclavian artery and descends through anterior ends of upper six intercostal spaces lying 1[?]25 cm lateral to sternal margin.o It divides into two terminal branches, musculophrenic and superior epigastric in 6th intercostal spaceo Branches of internal thoracic artery are:-i) Mediastinal branchesii) Pericardial branchesiii) Sternal branchesiv) Pericardiophrenic branchesv) Anterior intercostal arteries (in upper six spaces)vi) Perforating branchesvii) Two terminal branches, musculophrenic and superior epigastric.