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Carnegie Stage Section
L-4 spinal ganglion, L-5 spinal ganglion, ala of sacrum, anal fold, anal pit, anterior spinal artery, dorsal horn of grey matter, gluteus medius muscle, gluteus minimus muscle, pudendal nerve, rectum, right foot, superior gluteal nerve, sympathetic trunk, ventral horn of grey matter
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Carnegie Embryo #4090   |   Location: 23-19

Keywords: L-4 spinal ganglion, L-5 spinal ganglion, ala of sacrum, anal fold, anal pit, anterior spinal artery, dorsal horn of grey matter, gluteus medius muscle, gluteus minimus muscle, pudendal nerve, rectum, right foot, superior gluteal nerve, sympathetic trunk, ventral horn of grey matter

Source: The Virtual Human Embryo.