Final answer:
The thyroid gland controls sleep-wake cycles, while the pineal gland secretes melatonin to regulate the sleep-wake cycle.
Explanation:
Thyroid gland - controls sleep-wake cycles
The thyroid gland, located in the neck, produces hormones that regulate various functions in the body. One of its key functions is influencing the sleep-wake cycles.
Pineal gland - secretes melatonin, controlling the sleep-wake cycle and other processes. The production of melatonin is affected by light conditions, assisting in the regulation of the body's internal clock.
Learn more about Endocrine system here:
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