This pathway provides an in-depth look at an overview of the endocrine system, hormones, the pituitary gland & hypothalamus, the thyroid gland, the parathyroid glands, the adrenal gland, the pineal gland, gonadal & placental hormones, the endocrine pancreas, organs with secondary endocrine functions, and development & aging of the endocrine system. The pathway also provides vocabulary support for these topics, as well as opportunities for learners to self-assess their understanding by analyzing figures and answering questions.