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29 October, 10:41

Which structure secretes hormones directly into the bloodstream without using a duct?

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  1. 29 October, 11:17
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    The answer is endocrine glands.

    There are two types of glands - endocrine and exocrine glands. Endocrine glands secrete hormones directly into the bloodstream without using a duct, while exocrine glands secrete hormones through the duct. Endocrine glands include pancreas, hypothalamus, pineal gland, pituitary gland, thyroid gland, parathyroid gland, adrenal gland, ovaries, testes.
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