Melatonin is released by brain (epiphysis). It is connected with rythms of arousal and sleep.
Pineal.
The pineal gland (or, epiphysis) synthesizes and secretes melatonin.
pineal gland
secretes melatonin
pineal gland
No, the pineal gland secretes melatonin. The pancreas secretes insulin.
No, the pineal gland secretes melatonin. The adrenal gland secretes epinephrine.
the pineal gland.
Suprachiasmatic nucleus
the ovaries
catecholimides
small intestine