Which system is comprised of specialized glands that regulate growth and development in the body?

The endocrine system is responsible for regulating growth and development in the body through the secretion of hormones. Hormones are chemical messengers released by specialized glands such as the pituitary gland, thyroid gland, adrenal glands, and pancreas. These hormones travel through the bloodstream to target organs and tissues, facilitating a wide range of bodily functions including metabolism, sexual function, and overall growth.

This system plays a crucial role in maintaining homeostasis and allows for communication between different parts of the body to ensure they work together harmoniously. The precise coordination of hormonal signals is essential for processes like puberty, which involves significant physical and emotional changes.

While the nervous system also plays a role in regulating bodily functions, it does so through electrical impulses and neurotransmitters, rather than through hormones. The circulatory system is primarily responsible for the transport of blood, nutrients, oxygen, and hormones throughout the body, and the respiratory system is focused on gas exchange and breathing. Therefore, the endocrine system is the correct choice when it comes to specialized glands that manage growth and development.