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16.4: The Pineal Gland

Anatomy and Physiology of Animals · LibreTexts

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    From LibreTexts, under CC BY-SA 3.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    The pineal gland is found deep within the brain (see diagram 16.4). It is sometimes known as the ‘third eye” as it responds to light and day length. It produces the hormone melatonin, which influences the development of sexual maturity and the seasonality of breeding and hibernation. Bright light inhibits melatonin secretion Low level of melatonin in bright light makes one feel good and this increases fertility. High level of melatonin in dim light makes an animal tired and depressed and therefore causes low fertility in animals.

    Anatomy and physiology of animals Pineal gland.jpg

    Diagram 16.4 - The pineal gland

    This page titled 16.4: The Pineal Gland was last modified on Thu, 15 Sep 2022 20:02:53 GMT and is shared under a CC BY-SA 3.0 license and was authored, remixed, and/or curated by Ruth Lawson via source content that was edited to the style and standards of the LibreTexts platform.