Endocrine glands ________.

A. Do not have ducts to carry their product to a surface
B. Do not have ducts to retain their product below surface
C. Have ducts that carry their secretory product to a surface
D. Have ducts to retain their secretory product below surface

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http://www.emedicinehealth.com/anatomy_of_the_endocrine_system/article_em.htm

The correct answer is A. Endocrine glands do not have ducts to carry their product to a surface.

To arrive at this answer, we can begin by understanding what endocrine glands are. Endocrine glands are a type of gland in the body that are responsible for producing and secreting hormones directly into the bloodstream. Unlike exocrine glands, which have ducts to transport their secretions to a specific location, endocrine glands release their hormones directly into the bloodstream.

To support this knowledge and confirm the correct answer, we can also examine specific examples of endocrine glands. The pituitary gland, thyroid gland, adrenal glands, and pancreas are all examples of endocrine glands, and none of them have ducts to carry their secretions to a surface.

Therefore, by understanding the function and examples of endocrine glands, we can conclude that they do not have ducts to carry their product to a surface.