Which system is involved with growth and metabolism control?

The endocrine system is a collection of glands that produce hormones, which are chemical messengers that regulate various functions throughout the body, including growth and metabolism. Hormones released from the endocrine glands can influence many aspects of physical development, such as the growth of bones and muscles, the regulation of metabolism (how the body uses energy from food), and the maintenance of homeostasis.

For example, growth hormone released from the pituitary gland promotes growth in children and adolescents, and thyroid hormones are crucial for regulating the rate of metabolism. The endocrine system thus plays an essential role in coordinating growth processes and ensuring that metabolic activity is balanced, adapting to the body's needs at different stages of life.

The other systems, while essential for overall bodily function, do not specifically focus on regulating growth and metabolism to the same extent as the endocrine system. The nervous system is primarily involved in communication and reflexes, the digestive system focuses on breaking down food and nutrient absorption, and the circulatory system is responsible for transporting blood and nutrients throughout the body.