Final answer:
The suture between the two parietal bones is the sagittal suture, which runs along the midline on top of the skull and is part of the complex series of immobile joints called skull sutures that protect the brain.
Step-by-step explanation:
The suture found between the two parietal bones of the skull is called the sagittal suture. It extends from the coronal suture posteriorly, along the midline on top of the skull in the sagittal plane. It is part of the skull sutures, immobile joints filled with dense fibrous connective tissue to unite and protect the bones of the skull. Alongside the sagittal suture, other significant sutures include the coronal suture, joining the frontal bone to the parietal bones, and the lambdoid suture, uniting the occipital bone with the parietal and temporal bones in an inverted V shape.