What is one of the primary functions of the endocrine system?

The primary function of the endocrine system is to control growth and metabolism. This system consists of glands that release hormones, which are chemical messengers in the body. These hormones regulate a wide array of physiological processes, including growth, development, metabolism, and even mood. For instance, the thyroid gland produces hormones that influence how the body utilizes energy, while growth hormone from the pituitary gland directly impacts physical growth during childhood and adolescence.

The other options describe functions of different body systems. The support and movement of the body are primarily functions of the skeletal and muscular systems, while the breakdown of food is the role of the digestive system. Delivering oxygen to tissues is the responsibility of the circulatory system, specifically through the action of the heart and blood vessels. Understanding that the endocrine system plays a crucial role in hormonal regulation helps clarify its importance in maintaining overall health and homeostasis.