A section through the T-10–L-2 dermatomes and a longitudinal section of the notochord.
Observe:
1. The close relation of the dermatomes to the ectoderm.
2. The sclerotomes on each side of the notochord separated from one another by dorsal intersegmental arteries.
Keywords: L-1 dermatome, L-2 dermatome, T-10 dermatome, T-10 neural crest, T-11 dermatome, T-11 sclerotome, T-12 sclerotome, dorsal intersegmental artery, ectoderm, mantle-ependymal layer, marginal layer, neural tube, notochord
Source: Atlas of Human Embryos.