Fact 1: Hormones are chemical messengers that control many body functions.

Fact 2: Hormones are produced and released by the endocrine system .

Given the two facts above, answer the question "Which body system releases chemical messengers that control many body functions?" with the following options: 
- athletes
 - acetic acid
 - sweating
 - Endocrine system
 - heat or cold
 - Electrical energy
 - Veins and arteries.
 - sensory neurons


 

    Endocrine system     