Source: Video Images: Endocrine System, Public Domain: http://bit.ly/W3lsiR; Pituitary Gland, Creative Commons: http://bit.ly/UD1dr4; Pineal Gland image, Public Domain: http://bit.ly/cOt5fC; Thyroid Gland, Creative Commons: http://bit.ly/Ae9Ub4
A hormone secreted during childhood, from the pituitary gland, that affects the physical growth of a person; too little can result in dwarfism while too much can result in gigantism.
A chemical secreted by a gland that affects internal and external activities.
The "master gland" of the endocrine system; secretes hormones that affect other glands.
Gland located in the neck which is responsible for the regulation of metabolism.