The body has many distinct systems that allow even the most fundamental life functions to take place. Each of these systems works independently, but together they achieve a living breathing organism that is able to perform well beyond basic living requirements. The human body systems are composed of the circulatory, digestive, endocrine, immune, lymphatic, muscular, nervous, reproductive, respiratory, skeletal and urinary systems.
The endocrine system specifically is made up of a number of glands that produce hormones which act as the body’s long-distance messengers. Hormones are chemicals that enact a certain response from another part of the body which can control body functions such as metabolism, growth, and sexual development. The glands within the endocrine system include the pituitary, thyroid, parathyroid glands, adrenal glands, thymus, pineal body, pancreas, ovaries, and testes; all which release hormones directly into the bloodstream and will cause the desired effect as enlisted by the hypothalamus.
The hypothalamus is the portion of the brain that links the nervous system to the endocrine system; one of its main functions being to synthesize and secrete neurohormones that will stimulate or inhibit the secretion of pituitary hormones. The pituitary is considered the master gland and regulates homeostasis (or constant condition) which includes releasing hormones to stimulate the other endocrine glands. There are two lobes to the pituitary gland, the posterior and anterior. The anterior pituitary has a direction relation to control the activity of the adrenal gland, thyroid and gonads.