Notochord is a rod of cartilage-like tissue Persist in some marine species, replaced by vertebral column, except in intervertebral discs. Importance during neurulation paraxial mesoderm Located on both sides of axial mesoderm .
Mesenchymal cells condense to somitomeres .
These mature to somites . Formation of Bowman s capsule and proximal and collecting tubules. Lateral folding and craniocaudal flexion close the disk into a tube. Pouches bulge out from pharyngeal endoderm and enclose adjacent mesoderm. Lung forms as a diverticule from the foregut, followed by branching .