Match early and later structures of the mesoderm __-__-_ Heart 6_-_ peritoneum (visceral and parietal) 1. Notochord 4___ Ventral abdominal dermis 2. Somite 3__- Kidney 3. Intermediate [_-_ Adrenal cortex 4. Somatic 4__ Thoracic Vertebrae 5. Splanchnic 2__ Nucleus pulposus (center of the vertebral discs) 6. Lateral Plate 2__ Skeletal muscle .