Description1911 Britannica - intercostal arteries.png
English: Diagram of a pair of intercostal arteries. Ao, The aorta transversely divided, giving off at each side an intercostal artery. PB, The posterior or dorsal branch. AB, The anterior or proper intercostal branch. IM, A transverse section through the internal mammary artery. Illustration from 1911 Encyclopædia Britannica, article Arteries.
This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.
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