Somites are transient segments formed in a rostro-caudal progression during vertebrate development. In chick embryos. segmentation of a new pair of somites occurs every 90 minutes and involves a mesenchyme-to-epithelium transition of cells from the presomitic mesoderm. Little is known about the cellular rearrangements involved. https://ashleyshomestores.shop/product-category/wall-shelf-set-3-cn/