The Pineal Gland
- Location: Dorsal side of forebrain.
- A hormone secreted: Melatonin.
- Functions of melatonin : 1. Melatonin is very important for the regulation of a 24-hour (diurnal) rhythm of our body.
Example: It helps in maintaining the normal rhythms of the sleep-wake cycle, body temperature, etc. 2. It also affects - metabolism, pigmentation, menstrual cycle, and our immune system.