As we have learnt:
Endocrine Glands:
- Endocrine glands lack ducts and are hence, called ductless glands.
- Their secretions are called hormones.
- The classical definition of the hormone is a chemical produced by endocrine glands and released into the blood and transported to a distantly located target organ.
- Hormones are non-nutrient chemicals which act as intercellular messengers and are produced in trace amounts.
-Endocrine glands lack ducts and are hence, called ductless glands. Hence, the correct option is d. endocrine glands
View full answer