Pineal Gland - Definition, Location & Function - Human Anatomy | Kenhub
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Glands - What Are Glands - Types Of Glands - Merocrine Glands - Apocrine Glands - Holocrine Glands
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2-Minute Neuroscience: Pineal Gland
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Exocrine Gland and Endocrine Glands
A gland is a group of cells in an animal's body that synthesizes substances for release into the bloodstream or into cavities inside the body or its outer surface.