Updated on November 10, 2024 Development of the sternum Sternal bars (pair of ventral mesenchymal bands) develop ventrolateral on the body wall Chondrofication occurs as the bars move medially Fuse by week 10 craniocaudally in the median plane Form cartilaginous models of the manubrium, sternebrae, and xiphoid process Manubrium develops from mesenchyme btw the clavicle...