What is responsible for transporting hormones within the body?

The endocrine system is responsible for the production and secretion of hormones, which are chemical messengers released directly into the bloodstream. Once in circulation, hormones travel throughout the body to various organs and tissues, where they exert their effects on physiological processes such as metabolism, growth, and mood regulation.

While the nervous system facilitates communication through electrical signals and neurotransmitters, and the circulatory system is responsible for the transportation of blood and nutrients, the primary function of the endocrine system is to manage hormonal communication. The respiratory system, in contrast, deals mainly with gas exchange and does not play a direct role in hormone transport. Therefore, the correct answer reflects the unique and essential function of the endocrine system in hormone transport and regulation within the body.