The endocrine system is a control system of ductless endocrine glands that secrete chemical messengers called hormones that circulate within the body via the bloodstream to affect distant organs.

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Hous

Patient resource for type 1 diabetes, type 2 diabetes, thyroid cancer, osteoporosis, adrenal disorders and other endocrine disorders. Includes information on treatments, conditions, surgery, prevention and recovery. Reviewed by leading endocrinologists.

TargetWoman - Women Portal presents painstakingly researched extensive information in the form of thousands of condensed pages of lasting value and a handpicked selection of websites targeted at Women in the women directory section.