Which suture lies between the left and right parietal bones, and when does it fuse?

Which suture lies between the left and right parietal bones, and when does it fuse?

• A. Coronal suture; 25-35 years
• B. Lambdoid suture; 30-40 years
• C. Squamous suture; 18-25 years
• D. Sagittal suture; 21-30 years

Answer: (D)

The sagittal suture runs along the midline on top of the skull, between the left and right parietal bones. It functions as a growth joint during development and gradually ossifies as you reach adulthood. It typically fuses in early adulthood, around 21 to 30 years, though there is individual variation.

The sagittal suture runs along the midline on top of the skull, between the left and right parietal bones. It functions as a growth joint during development and gradually ossifies as you reach adulthood. It typically fuses in early adulthood, around 21 to 30 years, though there is individual variation.