Upper Back Muscles Diagram / Labeled Anatomy Chart Of Male Triceps And Back Muscles On White Background Stock Photo Download Image Now Istock : The veins of the upper portion of the back drain into the posterior intercostal veins, while lumbar veins from the lower portion of the back drain into the inferior vena cava.

Upper Back Muscles Diagram / Labeled Anatomy Chart Of Male Triceps And Back Muscles On White B…