 In the developing vertebrate embryo, somites split to form dermatomes, skeletal muscle (myotomes), tendons and cartilage (syndetomes) and bone (sclerotomes).Because the sclerotome differentiates before the dermatome and the myotome, the term "dermomyotome" refers to the combined dermatome and myotome before they separate out.The dermatome is the dorsal portion of the paraxial mesoderm somite which gives rise to the skin (dermis).