Which of the Following is Not an Endocrine Gland

Question

Which of the following is not an endocrine gland?
A) duodenum
B) pituitary
C) adrenal
D) pineal
E) thymus

Accepted Answer

The duodenum is not an endocrine gland. It is a part of the small intestine and plays a role in digestion rather than hormonal regulation. The other options are all endocrine glands that secrete hormones into the bloodstream to regulate various physiological processes.