Final answer:
The hypothalamus, located in the brain, is the part of the endocrine system that controls the master gland of the system, the pituitary gland. The parathyroid glands, adrenal glands, and pancreas are other components of the endocrine system; however, they are not located in the brain.
Step-by-step explanation:
The part of the endocrine system that can be found in the brain is the hypothalamus. The hypothalamus is a crucial component of the endocrine system; it controls many bodily functions by regulating the pituitary gland—the master gland of the endocrine system. The hypothalamus secretes hormones that communicate with the pituitary gland, which then releases its own hormones to regulate other endocrine glands such as the thyroid gland, adrenal glands, and the pancreas, among others.
Other parts of the endocrine system mentioned, such as the parathyroid glands, are located on the posterior of the thyroid gland, not in the brain. The adrenal glands sit on top of the kidneys, and the pancreas is situated between the stomach and the small intestine.