The developing wing bud of a four day chick embryo showing the pattern of spinal nerves growing into it. The nerves are made visible by staining a specific neural protein (3AIO monoclonal antibody, which has a neurofilament associated antigen). The wing bud itself is about 1 mm wide.
B0000068 Nerve growth in wing bud. Wellcome Images available under the following creative commons usage http://creativecommons.org/licenses/by-nc-nd/2.0/uk/
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