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The importance of light and darkness for our body clocks
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26:34 - 30:17 (03:43)

Our body's tissues have their own melatonin receptors, and in darkness, the pineal gland synthesizes melatonin which relays the signal of darkness throughout the body. The body has evolved timing systems to help anticipate daily changes in the environment, such as changes in light exposure and predation risk, which regulate the body's clock, affecting various body functions.

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