melatonin is the hormone that the pineal gland secretes.
the hormone that the pineal gland secretes is?
melatonin
several areas of the human brain are not on the brain side of the bbb. some examples of this include the circumventricular organs, the roof of the third and fourth ventricles, capillaries in the pineal gland on the roof of the diencephalon and the pineal gland. the pineal gland secretes the hormone melatonin "directly into the systemic circulation", thus melatonin is not affected by the blood–brain barrier.





























section::::structure.:development.
blood–brain barrier
section::::secretory organs.:pineal gland.





























section::::secretory organs.:pineal gland.:anatomy.





























section::::secretory organs.:pineal gland.:anatomy.:gross anatomy.





























the morphology of the pineal gland varies greatly among mammals. the most commonly used classification for this gland takes into account its location relative to the diencephalon and the third ventricle of the brain, as well as its size and shape. under these conditions, the human pineal gland is classified as type a. a type a pineal gland rests proximally to the posterior section of the diencephalon. it is located within 1-2mm of the midline of the brain.
circumventricular organs