The hormone system also co-ordinates the body. Hormones are chemical messages carried in the blood plasma. Hormones affect our rate of metabolism growth, and sexual developement. The pituitary is a gland at the base of the brain that controls other hormone glands.
Hormones are Chemical messengers sent in the blood
Homones are chemicals released directly into the blood. They're carried in the blood plasma to the other parts of the body, but only affect particular cells…