Which system is responsible for regulating body processes by releasing hormones?

The endocrine system is responsible for regulating various body processes through the release of hormones. Hormones are chemical messengers that travel through the bloodstream to target organs and tissues, influencing functions such as metabolism, growth, reproduction, and mood. This system comprises various glands, such as the pituitary, thyroid, and adrenal glands, each releasing specific hormones that play distinct roles in maintaining homeostasis and regulating bodily functions.

In contrast, the nervous system relies on electrical signals transmitted through neurons for quick responses to stimuli but does not primarily utilize hormones for regulation. The muscular system is mainly concerned with movement and physical activity, while the immune system focuses on defending the body against pathogens and does not play a direct role in hormonal regulation. Therefore, the correct identification of the endocrine system highlights its crucial function in controlling and coordinating many physiological processes via hormonal action.