Answer:
Pituitary Gland
Step-by-step explanation:
The pituitary gland is the crucial gland of endocrine system and is located in the lower side of brain just behind the nose. This gland secrete hormones directly into the blood. The hormones secreted by pituitary affects the reproductive organ, adrenal gland and more specifically thyroid gland.
The gland regulate endocrine secretions by pancreas. The endorphins are certain chemicals helps in the reduction of pain.