The endocrine system most basically includes a number of hormones and glands within the body.  As a system of glands, the endocrine system is defined by these glands, which secretes hormones into the body to regulate it, as an information signal system.  The hormones are the body’s chemical messengers that transfer information from one set of cells to the other.  Glands are a group of cells that produces and secretes chemicals.

The endocrine system works with many other systems and parts of the body.  Inclusive to the reproductive system, the endocrine system works with the nervous system, gut, liver, kidneys, pancreas, and fat.  The growth and development, energy levels, homeostasis, and responses and monitored in cooperation with these systems and parts of the body.

Produced for use inside the body are hormones that are made by endocrine glands.  Similar to factories, they produce and store hormones in order to release them as needed.  When this occurs, the hormones are carried within the bloodstream to targets, such as organs, cells, or tissues (Scanlon 224)

Normal functioning of the endocrine system is important.  For this to occur the body needs properly working glands, functioning within the blood supply to move hormones to their target points, receptor locations on target cells for the hormones, and a system in which the production and use of hormones in place.  All of these factors for control within the endocrine system is vital for proper functioning.

A number of things can go wrong in the endocrine system.  For instance, a hormone imbalance may take place when the wrong amounts of hormones are released within certain areas of the body.  An endocrinologist is able to identify such problems.