Nervous system is the second way to communicate with the muscles. The communication between the central nervous system and the other parts of the body is facilitated by the peripheral nervous system consisting of cranial nerves arising from the spinal cord.
The forebrain is the main thinking part of the brain. It has regions which receive sensory impulses from various receptors. The brain has three major parts, namely the fore brain, mid brain and hind brain. Midbrain and Hindbrain control involuntary activities. Cerebellum controls voluntary activities.
Hormones are part of the endocrine system which constitutes a second way of control and coordination in our body. Hormones produced in one part of an organism move to another part to achieve the desired effect.
Including animals and human being Adrenaline is secreted directly into the blood and carried to different parts of the body. The target organs or the specific tissues on which it acts include the heart.