What term describes the network of glands that regulate various bodily functions through hormone secretion?

The term that describes the network of glands responsible for regulating various bodily functions through the secretion of hormones is the endocrine system. This system plays a crucial role in maintaining homeostasis by releasing hormones directly into the bloodstream, which then travel to target organs and tissues to elicit specific physiological responses.

Hormones are essential for regulating processes such as metabolism, growth and development, tissue function, sleep, and mood, among others. For instance, the pancreas releases insulin, which is vital for glucose metabolism, while the adrenal glands secrete cortisol, influencing stress response and metabolism.

In contrast, other systems mentioned in the choices have different primary functions. The nervous system, while critical for controlling and communicating within the body, operates through electrical signals rather than hormones. The immune system is dedicated to defending the body against pathogens and foreign invaders. The digestive system's main role is the breakdown and absorption of nutrients, and it does not primarily function through hormonal regulation. Therefore, the endocrine system stands out as the correct answer when discussing hormone secretion and regulation of bodily functions.