What is a key function of the endocrine system?

The endocrine system plays a crucial role in the body primarily through the production and secretion of hormones, which are chemical messengers that regulate various physiological processes. These hormones can influence metabolism, growth and development, mood, and even reproduction. The glands in the endocrine system, such as the pituitary, thyroid, and adrenal glands, release hormones directly into the bloodstream, allowing them to reach target organs and tissues throughout the body. This system is essential for maintaining homeostasis, which is the body’s stable internal environment, by adjusting bodily functions in response to internal and external changes. While the other choices pertain to important biological functions, they are not the primary role of the endocrine system.