1995 UMLS C0224355 Internal intercostal muscles body part, organ, or organ component first internal intercostal muscles second internal intercostal muscles third internal intercostal muscles fourth internal intercostal muscles fifth internal intercostal muscles sixth internal intercostal muscles seventh internal intercostal muscles eighth internal intercostal muscles ninth internal intercostal muscles tenth internal intercostal muscles eleventh internal intercostal muscles human 1 Visible Human Male National Library of Medicine (NLM) Male Caucasian 38 http://anatquest.nlm.nih.gov/VisibleHuman/ImageData/Rendered/jpg/DSR110224355.jpg 1 anterior anterior http://anatquest.nlm.nih.gov/VisibleHuman/ImageData/Rendered/thumbnails/DSR110224355.jpg