With regard to intercostal spaces:

• A. the neurovascular bundle runs in the plane between external intercostal and internal intercostalnmuscles
• B. neurovascular structures lie in the order of nerve, artery, vein from above downwards
• C. the upper two spaces are supplied by the supreme intercostal artery
• D. the collateral branches of the intercostal artery and nerve run along the upper border of the rib that forms the lower boundary of the space
• E. the collateral branch of the intercostal nerve supplies skin over the space