Answer: B
Explanation: The endocrine system is a collection of glands that produce and secrete hormones, which are chemical messengers that regulate many body processes, such as growth and development, metabolism, and reproduction. Hormones are released into the bloodstream and travel to target cells or organs, where they bind to specific receptors and trigger a response. The endocrine system works in conjunction with the nervous system to regulate and maintain homeostasis in the body. Unlike the nervous system, which transmits electrical signals between neurons, the endocrine system relies on hormones to transmit information between cells and tissues.