| 21. | Interestingly, the tuatara's pineal gland functions as a third eye.
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| 22. | Light-sensitive nerve cells called pineal hormone melatonin.
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| 23. | Melatonin secretion by the brain's pineal gland is triggered by darkness.
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| 24. | The young mice had all but lost their thymus glands after the pineal transplant.
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| 25. | This may contribute to lowered levels of monoamines in aged brain and pineal gland.
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| 26. | Nearly all vertebrate species possess a pineal gland.
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| 27. | In 1917, it was known that extract of cow pineals lightened frog skin.
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| 28. | The pineal body lies just above the diencephalon.
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| 29. | The tumor is called a " chorionic gonadotropin secreting pineal tumor ".
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| 30. | :: : : Well, what about the article about the pineal gland?
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