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ayother ayother
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6 years ago
Endocrine glands are ductless glands; they release
 
  A) substances to the outside world.
  B) hormones to the outside world.
  C) perspiration, among other things.
  D) hormones into the circulatory system.
  E) chromosomes into nuclei.
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wrote...
6 years ago
Answer: D
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