Final answer:
The endocrine system is a group of glands that secrete hormones into the bloodstream to control and regulate various body processes.
Step-by-step explanation:
The endocrine system is a group of glands that secrete hormones into the bloodstream, which control and regulate various body processes. Hormones act as chemical messengers, signaling cells to perform specific functions. The endocrine system is regulated by the hypothalamus, which controls the pituitary gland, also known as the master gland. Other glands in the endocrine system include the thyroid gland, pancreas, and adrenal glands.