<prompt> Ribs develop from:Endothoracic fasciaPara-axial mesenchymeDeep intercostal fasciaSuperficial intercostal fascia  <response>: Ans. B Para-axial mesenchymeRef: Grays Anatomy, 41st ed. pg. 212 The axial skeleton, vertebrae and ribs are derived from paraxial mesenchyme The skull is derived from paraxial mesenchyme and neural crest mesenchyme The skeletal elements in the limbs are derived from somatopleuric mesenchyme, which forms the limb buds. 