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Introduction to human endocrine system - class-XII
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Which one of the following pairs of organs includes only the endocrine glands?
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A
Parathyroid and adrenal
💡 Explanation:
Hormones are secreted by the endocrine system. Endocrine glands do not have ducts. Their secretions (hormones) are secreted into the bloodstream. Discrete endocrine glands - these include the pituitary (hypophysis), thyroid, parathyroid, adrenal and pineal glands. Endocrine component of glands with both an endocrine and an exocrine function- these include the kidney, pancreas and gonads.