Multiple choice

Brain sand is found in

  1. pineal body

  2. thymus gland

  3. thyroid gland

  4. pituitary gland

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Brain sand, or acervuli, are small calcified structures found in the pineal gland of humans and other animals. Their presence increases with age and they are often used as landmarks in radiological imaging of the brain.