The central nervous system (CNS), which is made up of the brain and the spinal cord, and the peripheral nervous system (PNS), which is comprised of nerves and ganglia (small concentrations of grey matter).
The brain sends messages to the peripheral nerves in the body via the spinal cord, these have control of muscles and internal organs.
Answer:
<h2> I don't know but my Answer is </h2><h3>from different environments ,each structure suits their environment better than the other's</h3>
1. The four primary functions of carbohydrates in the body are to provide energy, store energy, build macromolecules, and spare protein and fat for other uses.
2. Glucose energy is stored as glycogen, with the majority of it in the muscle and liver.
Examples:
1. Beans and legumes, such as black beans, chickpeas, lentils and kidney beans.
2. Fruits, such as apples, berries and melons.
3. Whole-grain products, such as brown rice, oatmeal and whole-wheat bread and pasta.
4. Vegetables, such as corn, lima beans, peas and potatoes.