Embryonic nerves and arteries

Nerves (green) associate with arteries (red) in the embryonic limb skin.

Image courtesy of National Heart Lung and Blood Institute (as a part of the NIH and U.S. Department of Health and Human Services). The source document is: http://dir.nhlbi.nih.gov/labs/ldb/sc/nerves.asp. NHLBI material should not be used in any direct or indirect product endorsements.