Which statement correctly contrasts endocrine glands and exocrine glands? A. Endocrine glands secrete hormones directly into blood, and exocrine glands secrete hormones into ducts. B. Endocrine glands are typically found in the cutaneous membrane, and exocrine glands are found all over the body. C. Endocrine glands form tissue layers, and exocrine glands form organs. D. Endocrine glands secrete one type of hormone, and exocrine glands secrete several types of hormones.

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The correct answer is A.

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