6. Which one of the following is the smallest endocrine gland in human body?

(A) Adrenal
(B) Thyroid
(C) Pituitary
(D) Pancreas

Ans: (C) Pituitary

Endocrine Gland: The endocrine system consists of various glands situated in different parts of the body and each gland produces different hormones which regulate the activity of other organs and tissues in the body. These hormones are released directly into the blood through the relevant gland.

**Among the above options 'Pituitary' is the smallest endocrine gland in human body. But actually the pineal gland (also called the pineal body or epiphysis, is also called third eye) is the smallest endocrine gland located in the brain. 

**What the differences between pituitary gland and pineal glands?

1. In human body the pituitary gland is larger than pineal gland. Pituitary gland is pearl shaped and has two lobes (anterior & posterior).

2. Pineal gland maintains the biological clock and secretes melatonin hormone for sleep where as pituitary gland secrets nine hormones for body homeostasis.