Ribs are developed from ?

Ribs are derived from lateral cells of sclerotome.Derivatives of paraxial mesoderm Paraaxial mesoderm is organized into somites which in turn gives rise toi) Sclerotomes : Form axial skeleton including veebrae, ribs and pas of neurocranium.ii) Myotomes : Form all voluntary (skeletal) muscles of head, trunk and limbs.iii) Dermatomes : Form dermis of skin, especially over dorsal regions.