Endocrinology is the study of hormones. The endocrine system is a network of specialized glands and tissues that secrete hormones into the blood stream to regulate and coordinate vital physiological processes. In the endocrinology portion of the CHB Course, we will explore the function and dysfunction of the major endocrine glands. You will learn normal physiology, the important concept of feedback regulation, and the clinical implications, causes, and treatment of endocrine dysfunction. Because of the way the endocrine system affects many organs, a solid grasp of these concepts is critical for success in future blocks.