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Textbook Expert
Textbook ExpertVerified Tutor
26 Oct 2021

Background and context

Endocrine glands lack ducts and pass their secretions into the surrounding blood for transport to the site of action. They are also called ductless glands or glands of internal secretions. These secreted the informational molecules called hormones. They control the long-term activity of target organs like growth and development, etc. 

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