Ribs develop from:
Ans. B Para-axial mesenchymeRef: Gray's 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.
Endothoracic fascia
Para-axial mesenchyme
Deep intercostal fascia
Superficial intercostal fascia
Thorax