Which does most of the work of the endocrine system APEX

Answer: A compound called a hormone released by an endocrine gland.

Explanation:

The endocrine chemicals and hormones move through the body via blood vessels to the cells. The endocrine system impacts other systems of the body: the nervous system, the circulatory system and the digestive system to make it possible to regulate body functions such as growth, body temperature, digestion and glucose metabolism.

The kidneys do most of the work in the endocrine.