மூளையில் என்னதான் நடக்குது? - 3வது கண் பினியல் சுரப்பி | How Pineal gland regulates human body!

This video explains in detail about Pineal gland
- how is pineal gland secreted
- uses & benefits of pineal gland
- third eye & pineal gland
- pineal gland & circadian rhythm
- pineal gland & biological clock
- how pineal gland regulates human biological clock

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